1 Rearrange the words and phrases to make sentences. 重新排列单词和短语，组成句子。
(1) by taking short showers/can/we/save water
We can save water by taking short showers.
(2) use rainwater tanks/for watering plants/people/can/to collect water
.
(3) to reduce air pollution/take public transportation/should/we/as often as possible
.
(4) may/to break down/some kinds of plastics/take hundreds of years

.

1. (1)We can save water by taking short showers. (2)People can use rainwater tanks to collect
water for watering plants. (3)We should take public transportation as often as possible to reduce air
pollution. (4)Some kinds of plastics may take hundreds of years to break down.

2 Complete the conversation with can, may and should. 用 can, may 和 should 完成对话。
Lu Yao, (1) you tell me something
about your neighbourhood garden?
Sure. Members in our neighbourhood (2) grow fruit, vegetables
and plants in it and we often share what we grow with each other.
(3) you grow fruit and vegetables by yourself?
I am still learning. It is hard work. It (4) take a lot of time
but the rewards are worth it. With enough patience and care,
you (5) enjoy the taste of your own fruit and vegetables.
That sounds great. (6) I visit
your neighbourhood garden someday?
Of course. You can come this Saturday morning. Will you be free then?
Yes. I am so excited about the visit. By the
way, (7) I bring anything with me?
No need at all. I'll be there waiting for you.

2. can; can; can; may; may/can; May/Can; should)