随堂演练
及时体验 巩固提升
Ⅰ.用适当的介词、副词填空
1．When spacemen get closer to the moon, they gradually become weightless and float ________ in spaceship cabin.
答案 around
2．Walking on the dark road, I fell ________ a branch.
答案 over
3．Using the computer isn't difficult once you get the hang ________ it.
答案 of
4．Can you help me ________ my work?
答案 with
5．I think you may be very disappointed ________ me.
答案 with
6．The idea of gravity has developed ________ a long period of time.
答案 over
7．Yang Liwei was lucky enough to be chosen to make a trip ________ space.
答案 into
