一、从方框中选择适当的词并用其正确形式填空。
without honey percent important action
1. They finally realized the of protecting the ecosystem.
2. They travelled to the forest a map and got lost.
3. It's necessary for everyone to take to save the earth.
4. This cake tastes better because it uses natural instead of sugar.
5. Only twenty of the students in our school take the bus to school.

1. importance
2. without
3. action
4. honey
5. percent

1. the + 名 + of 结构，这里表示“保护生态系统的重要性”，importance 是 important 的名词形式，符合语境。
2. 根据“got lost”可知他们没带地图，“without”表示“没有”，符合题意。
3. “take action”是固定短语，意为“采取行动”，这里用复数形式 actions 表示泛指。
4. 根据“uses natural... instead of sugar”可知这里说的是用天然蜂蜜代替糖，honey 是“蜂蜜”的意思，符合语境。
5. “twenty percent”表示“百分之二十”，“percent”用单数形式。

二、用括号内所给词的正确形式填空。
1. The students were quite (disappoint) when they heard the bad news.
2. We should spend time doing something (protect) animals and plants in the world.
3. Dogs are different from (human), but they can still understand our feelings.
4. The Internet makes it possible for people (communicate) and share ideas in seconds.
5. In the forest, you can often see (ant) carrying food back home.
6. The earth is one of the eight (planet) in the solar system.
7. It's (importance) for us to develop good reading habits.
8. Red is usually (connect) with happiness in Chinese culture.
9. Look! The animals are (store) food to prepare for the winter.
10. Children usually have rich (imagine), and it helps them create wonderful stories in their minds.

1. disappointed
2. to protect
3. humans
4. to communicate
5. ants
6. planets
7. important
8. connected
9. storing
10. imagination

1. “quite”后接形容词，形容人感到失望用“disappointed”。
2. 动词不定式“to protect”作后置定语，修饰“something”，表示做某事的目的。
3. “human”表示人类时，常用复数形式“humans”。
4. “make it + 形容词 + for sb. + to do sth.”是固定句型，意为“对某人来说，做某事是……的”，所以用“to communicate”。
5. “ant”是可数名词，此处用复数形式“ants”表示一类事物。
6. “one of + 复数名词”表示“……之一”，所以“planet”用复数“planets”。
7. “It's + 形容词 + for sb. + to do sth.”是固定句型，“importance”的形容词形式是“important”。
8. “be connected with”是固定短语，意为“与……有联系”，所以用“connected”。
9. “Look!”表明动作正在进行，用现在进行时“are storing”。
10. “rich”后接名词，“imagine”的名词形式是“imagination”，不可数。

三、从方框中选择适当的短语并用其正确形式填空。
in fact in order to be home to play an important part in for this reason
1. Animals the ecosystem of our planet.
2. Many students thought the test was difficult, but , they all passed it.
3. The grassland of Africa lots of lions, zebras and giraffes.
4. Bees create honeycombs store honey.
5. Many animals lost their homes. , we should plant more trees.

1. play an important part in
2. in fact
3. is home to
4. in order to
5. For this reason

1. “play an important part in”表示“在……中扮演重要角色/起重要作用”，动物在地球的生态系统中起着重要作用，所以此处填“play an important part in”。
2. “in fact”意为“事实上”，许多学生认为考试难，但事实上他们都通过了，符合语境，故填“in fact”。
3. “be home to”表示“是……的家园”，非洲的草原是很多狮、斑马和长颈鹿的家园，主语是单数，be动词用is，所以填“is home to”。
4. “in order to”表示“为了”，蜜蜂造蜂巢是为了储存蜂蜜，所以填“in order to”。
5. “for this reason”表示“为此；由于这个原因”，很多动物失去家园，为此我们应该种更多树，符合逻辑，故填“For this reason”。

四、根据汉语意思翻译下列句子,每空一词。
1. 想象你正走在森林里。你可能会意识到人、植物和动物都是相互联系的。
you are walking in the forest. You may that people, plants and animals are all .
2. 大熊猫的数量正在下降,因此科学家们很担心。
pandas is dropping, so scientists are worried.
3. 你知道人类和其他昆虫之间有什么联系吗？
What do you know about the humans and other ?
4. 想想你能做些什么来保护地球上最神奇的动物之一。
Think about you can do to protect animals on earth.
5. 你还知道关于蜜蜂的其他有趣的事实吗？
interesting do you know about bees?

1. Imagine; realize; connected
2. The number of
3. connection between; insects
4. what; one of the most amazing
5. What other; facts

1. 第一空“想象”用动词原形Imagine，句首首字母大写；第二空“意识到”填realize，情态动词may后接动词原形；第三空“相互联系的”填connected。
2. “……的数量”用固定短语The number of，句首首字母大写。
3. “……和……之间的联系”用the connection between...and...，“昆虫”用insects表泛指。
4. 第一空“什么”用what引导宾语从句；“最神奇的动物之一”用one of the most amazing animals。
5. “其他有趣的事实”用other interesting facts，“什么”用What提问。