《2025年练习部分八年级英语上册沪教版54制》

1 Match the sentence halves. 将句子的前后句配对。
(1) As the sun heats water,     A. glaciers start to melt.
(2) When water vapour rises up to the sky and meets cold air,    B. it falls as rain or snow.
(3) When the water in the clouds gets too heavy to remain in the air    C. until they fixed the water system.
(4) We should save water    D. it joins together and forms clouds.
(5) As our planet gets warmer,     E. it turns into water vapour.
(6) The farmers had a tough time growing crops     F. before it gets too late.

答案：
(1)E
(2)D
(3)B
(4)F
(5)A
(6)C

2 Complete the tips of the swimming pool with when, before, after or until. 用when, before, after或until补全泳池的小贴士。
POOL TIPS
While using the swimming pool, please follow these rules:
- Always shower (1)before you enter the pool area.
- Watch your kids while they swim.
- (2)After you swim and shower, dry off well to avoid getting sick.
- (3)Before you leave the pool area, throw rubbish in the bins.
- Check your locker (寄存柜) before you go. Make sure you have all your things.

- In case of an emergency, leave the pool at once (4)when the lifeguard blows the whistle.
- Don’t swim (5)until the pool is cleaned thoroughly.
Thank you for helping keep our pool area safe and clean for everyone!

答案：
(1) before
(2) After
(3) Before
(4) when
(5) until