9.   In ten years,John____________ (be) an astronaut.

8.   He__________ at home now,but he_____________ in London next week, (be)

7.   People never know what____________  (happen) in 100 years.

6.   The boy___________ (be) able to ride a bike three month ago.

astronaut ， apartment ， space ， rocket ， fly

1.   They have six holiday____________ for sale.

2.   Do you know the first woman_____________ in our country?

3.   Look! Some birds are_____________ in the sky.

4.   My uncle made some model____________   in his free time.

5.   There is enough___________ in that classroom for sixty desks.

20.   几个孩子正在河里游泳。

_________  __________ several children____________ in the river.

19.   老师叫我们反复读这篇文章。

The teacher asked us to read the article _______  __________ _______  ______ 

18.   婴儿学走的时候经常会摔倒。

Babies often__________  ___________ when they learn to walk.

 17.   今天上午大量的人去这个城市中心。

 ___________  _________people went to the city center this morning.

16.   我经常问她问题，但她从不感到厌烦。

I often ask her questions,but she___________  ___________  ____________ .