1. In winter, much of the north is by snow.
2. There is nothing more (令人满足的) than seeing Xiwang grow into a big ball of fur.
3. “Take it easy, boy. Let me take your (温度),” said the doctor.
4. The foggy days during last winter holiday many traffic problems.
5. He has got a (严重的) illness and needs treatment.
6. Our (政府) provides free education for all children.
7. The earthquake was a terrible (灾难) that left thousands of people homeless.
8. We were busy (清理) the snow the whole morning.
9. Frightened by the loud noise, we looked at each other in (害怕).
10. (摇动) hands with others is a way to show your kindness.
11. It's easy for those who have no sense of to get lost in big cities.
12. you are now here, I will show you around our workplace.
13. After running around the playground for ten minutes, our hearts were (跳) fast.
14. What an (糟糕的) earthquake it was! Many people became homeless because of it.
15. Animals in the wild are now (面临) many problems.
16. Unlike (人类), wolves never kill small animals for fun.
17. She always has a (积极的) attitude towards life, even when facing difficulties.
18. The teacher (分成) the class into four groups for the discussion.
19. His hands were (冻僵了) after walking in the cold wind for a long time.
20. Many animals have to adapt to the changing (气候) to survive.
21. As time goes by, my grandmother can't see as (清楚) as she used to.
22. Little (企鹅) use their short wings to swim skillfully in the ocean.
23. He didn't study hard; (因此), he failed the exam.
24. The company is trying to (创建) a friendly working environment for its employees.
25. An (紧急情况) emerged and we didn't know what to do.
26. Bad luck! He (掉落) his glasses and they broke.
27. Everyone in the class went to the park (除…之外)Tom, because he was ill.
28. The (强度) of this rope is enough to support the weight of the box.
29. Some people waste food (然而) others may be suffering from hunger.
30. He keeps diaries to (记录) what happens in his life.

1. covered 2. satisfying 3. temperature 4. caused 5. serious 6. government 7. disaster 8. clearing 9. fear 10. Shaking 11. direction 12. Since 13. beating 14. awful 15. facing 16. humans 17. positive 18. divided 19. frozen 20. climate 21. clearly 22. penguins 23. therefore 24. create 25. emergency 26. dropped 27. except 28. strength 29. while 30. record

1. 由句意“冬天，北方大部分地区被雪覆盖”及首字母c可知填covered（被覆盖），此处是被动语态，用过去分词。
2. “令人满足的”修饰事物，用satisfying。
3. “温度”是temperature，take one's temperature（量体温）是固定短语。
4. 由“去年寒假的雾天导致了许多交通问题”及首字母c可知填caused（导致），用一般过去时。
5. “严重的”修饰名词illness，用serious。
6. “政府”是government，此处指我们的政府，用单数。
7. “灾难”是disaster，由a可知用单数。
8. “清理”是clear，be busy doing sth.（忙于做某事），用clearing。
9. “害怕”是fear，in fear（害怕地）是固定短语。
10. “摇动”是shake，此处是动名词短语作主语，用Shaking，句首首字母大写。
11. 由“在大城市容易迷路”可知是“方向感”，sense of direction，填direction。
12. 由“既然你现在在这里，我带你参观我们的工作场所”及首字母S可知填Since（既然），句首首字母大写。
13. “跳”是beat，由were可知此处是过去进行时，用beating。
14. “糟糕的”修饰名词earthquake，用awful。
15. “面临”是face，由now可知用现在进行时，be+现在分词，填facing。
16. “人类”是humans，此处表示泛指，用复数。
17. “积极的”修饰名词attitude，用positive。
18. “分成”是divide，由句意可知用一般过去时，填divided。
19. “冻僵了”是frozen，此处是形容词作表语。
20. “气候”是climate，此处指变化的气候，用单数。
21. “清楚”修饰动词see，用副词clearly，as...as中间用原级。
22. “企鹅”是penguin，由Little及their可知用复数penguins。
23. “因此”表示结果，用therefore。
24. “创建”是create，try to do sth.（努力做某事），用动词原形。
25. “紧急情况”是emergency，由an可知用单数。
26. “掉落”是drop，由broke可知用一般过去时，填dropped。
27. “除…之外”表示从整体中排除，用except。
28. “强度”是strength，此处指绳子的强度，用单数。
29. “然而”表示转折，且前后是对比关系，用while。
30. “记录”是record，此处是不定式作目的状语，用动词原形。

1. I will do everything I can those in need.
2. Even if baby pandas are born, they may get sick and die.
3. In the , many people did not understand her decision.
4. Mum TV when I got home yesterday.
5. to their hard work, the river is getting clearer and clearer.
6. The birds fly away a warm and sunny day.
7. His job is closely with what he has learnt at school.
8. Few people stayed after the terrible earthquake.
9. The children were enjoying the warm sunshine on the grass, up and down.
10. Eating a diet is necessary for maintaining good health.
11. The of the small tree can be seen day by day.
12. We should take some measures to solve problems.
13. It was raining last night, so the ground is all wet now.
14. The days of spring are and bright. It is the perfect time to fly a kite.
15. You'd better out because the weather is so awful.
16. They arrived home and sound yesterday.
17. They set up volunteer groups keep the wetlands free from pollution.
18. Constant practice of speaking English every day leads to your language skills.
19. The child was very when he opened the birthday present.
20. It was dark outside. Sue decided to the bank alone.
21. Life is ; safety comes first.
22. A disaster is a sudden and powerful event in nature.
23. Just at that moment,I saw some firemen through the trees.
24. To protect from the thick smoke, you can cover your mouth with a wet piece of cloth.
25. Keep smiling , and you will face each day with joy.
26. , more and more scientists are paying attention to coral reefs.
27. We must do something to prevent him out our secrets.
28. Forests make up nearly a of the earth's land area.
29. Plants in wetlands help get rid of and make the water clean.
30. My mother always warns me careful when crossing the street.

1. to help
2. easily
3. beginning
4. was watching
5. Thanks
6. to find
7. connected
8. alive
9. jumping
10. balanced
11. growth
12. environmental
13. heavily
14. windy
15. not go
16. safely
17. to help
18. improving
19. excited
20. not to go
21. priceless
22. natural
23. running
24. yourself
25. firmly
26. Luckily
27. speaking
28. third
29. pollution
30. to be

1. “I will do everything I can”的目的是“help those in need”，用不定式表目的，填to help。
2. 修饰动词“get”要用副词，“easy”的副词形式是easily。
3. “in the beginning”是固定短语，意为“起初”，填beginning。
4. “when I got home yesterday”是过去时态，妈妈看电视是过去某个时间正在进行的动作，用过去进行时was watching。
5. “thanks to”是固定短语，意为“多亏”，填Thanks。
6. “The birds fly away”的目的是“find a warm and sunny day”，用不定式表目的，填to find。
7. “be connected with”是固定短语，意为“与……有关”，填connected。
8. 修饰“stayed”表示“活着的”用形容词alive。
9. “The children were enjoying...”和“jump”是同时进行的动作，用现在分词作伴随状语，填jumping。
10. 修饰名词“diet”用形容词balanced，意为“均衡的”。
11. “the...of”结构中，“grow”要用名词形式growth，意为“生长”。
12. 修饰名词“problems”用形容词environmental，意为“环境的”。
13. 修饰动词“raining”用副词heavily。
14. 修饰“days”表示“有风的”用形容词windy。
15. “had better not do sth.”是固定结构，填not go。
16. 修饰动词“arrived”用副词safely。
17. “set up volunteer groups”的目的是“help keep the wetlands free from pollution”，用不定式表目的，填to help。
18. “lead to”后接名词或动名词，“improve”的动名词是improving，填improving。
19. 修饰“the child”表示“兴奋的”用形容词excited。
20. “decide not to do sth.”是固定结构，填not to go。
21. “life is priceless”表示“生命是无价的”，填priceless。
22. 修饰名词“disaster”用形容词natural。
23. “see sb. doing sth.”表示“看见某人正在做某事”，填running。
24. “protect yourself”表示“保护你自己”，填yourself。
25. 修饰动词“smiling”用副词firmly。
26. 修饰整个句子表示“幸运的是”用副词Luckily。
27. “prevent sb. from doing sth.”是固定结构，填speaking。
28. “a third”表示“三分之一”，填third。
29. “get rid of”后接名词，“pollute”的名词是pollution，填pollution。
30. “warn sb. to do sth.”是固定结构，填to be。