3. 水资源对我们非常重要。我们应该怎样珍惜它？听一听，判断下面的句子是否正确，正确的写T，错误的写F。
()① We can turn on the tap when we are not using it.
()② We can use the waste water to water plants.
()③ We should take longer showers and turn off the shower when washing our hair.
()④ Running water is good for brushing teeth and washing your face.
()⑤ There are totally(总共)four tips on saving water.

F T F F F

①不使用水龙头时应关闭，不是打开，故F。②废水可用于浇植物，符合节约用水，故T。③应缩短淋浴时间，不是延长，故F。④刷牙洗脸时开着流水浪费水，故F。⑤题目未提及具体节水建议数量，无法判断，故F。

4. 校园里关于环保的活动如火如荼。听一听，填入所缺的单词。
Hi, I'm Joe from Star Primary School. Our school is having a competition(竞赛)of things in our lives. All of us are happy to take part in it. Look, the pen on the table is made of a water bottle. We cleaned it and some pictures to make it beautiful. That with flowers was a juice glass. We also stick some together to make file folders. I put a lot of notes in it. Now, all of us use sides of the paper. When the paper is used, we cut it to make a smaller message pad(留言本). I want to reuse more things. I believe the Earth will become with our efforts(努力).

reusing; on; drew; vase; newspapers; both; cleaner

根据Unit 9 "Reusing things"主题及上下文语境，第一空围绕“重复利用物品”，填"reusing"；第二空“桌上的钢笔”用"on"；第三空“画图画”用"drew"；第四空“花瓶”用"vase"；第五空“旧报纸”用"newspapers"；第六空“纸的两面”用"both"；第七空“更干净”用"cleaner"。

5. 看一看，下面的知识你了解多少？选择填空。
()① The bottle is full water.
A. of
B. in
C. for
()② We should the empty bottles because we can reuse them.
A. keep
B. keeps
C. kept
()③ Don't these bottles. We can reuse them.
A. throw out
B. throw away
C. throw into
()④ Let's the flowers now.
A. watering
B. water
C. to water
()⑤ I don't like this vase. Can you show me one?
A. other
B. the other
C. another
()⑥ We can many old things.
A. reuse
B. reusing
C. reused
()⑦ Finally, they made the plastic bottles a piece of cloth.
A. out
B. into
C. to
()⑧ The students are how to make a pen holder.
A. learn
B. learns
C. learning

① A
② A
③ B
④ B
⑤ C
⑥ A
⑦ B
⑧ C

① "be full of" 是固定搭配，表示"充满"，故选 A。
② "should" 是情态动词，后接动词原形，故选 A。
③ "throw away" 表示"扔掉"，符合题意"不要扔掉这些瓶子，我们可以再利用"，故选 B。
④ "Let's" 后接动词原形，故选 B。
⑤ "another" 表示"另一个"，用于不确定范围内的另一个，故选 C。
⑥ "can" 是情态动词，后接动词原形，故选 A。
⑦ "make...into" 表示"把...制成"，是固定搭配，故选 B。
⑧ 句中用现在进行时，"be+动词-ing" 形式，故选 C。