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题目
用must或mustn‘t填空
You( ) goswimming with your parent.
You ( ) wear shoes to go into the swimming pool
You ( ) swim when you are sick
You ( )do warm up exercies before you swim.
You ( )must swim in a swimming suit
You ( ) take a bath before you go into swimming pool.
You( )put rubbish in the pool.
You ( ) cry for help and raise your hand when you are in difficulty .the life guide will come.
You ( ) put cameras mp3 or mobile phones near the pool.
You ( ) go swiwwing when there is a thunderstorm.

提问时间:2020-12-31

答案
1:must 2:must 3:mustn 4:must 5:mustn 6:mustn 7:must 8:mustn 9:mustn 10:must
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