Our teacher often encourages us ______ hard.

A.work B.to work C.working D.to working

The exciting thing has ______ these boys' attention.

A.left B.drew C.given D.drawn

All the butterflies have left ______ the north in spring.

A.to B.for C.at D.from

There are many mysteries to ______ by scientists.

A.discover B.discovering

C.be discovered D.be discovering

Don't cut down the trees ______ the butterflies need to rest on.

A.that B.what C.who D.where

单词造句

1.there, what, have, you, do

______________________________________?

2.planets, can't, I, still, any, see

______________________________________.

3.supper, join, maybe, we, after, can, you

______________________________________.

4.you, one, I, can, think, find, don't

______________________________________.

5.house, it's, your, whole, bigger, than

______________________________________.

6.kilometers, this, is, wide, only, 20, forest

______________________________________.

7.him, this, does, a, lot, worry

______________________________________?

8.south, they, fly, when, know, to

______________________________________.

9.snow, completely, the, the, covered, ground

______________________________________.

10.created, there, be, things, are, new, to, many

______________________________________.

完成句子

1.即使我们不能通过这次考试, 我们也要尽最大努力。

We will try our best__________ we can't pass the exam.

2.如果他不邀请我, 我不会去参加他的晚会。

I won't go to his party__________ he invites me.

3.通过这个望远镜, 我没能看到任何星星。

I can't see any stars__________ this telescope.

4.在其他行星上有生命吗?

Is there life______________?

5.太阳、地球和月亮都属于太阳系。

The sun, the earth and the moon__________ the solar system.

6.去年, 多达300名学生参加了校运动会.

__________ 300students took part in the school sports meeting last year.

7.越来越多的人对科学感兴趣了。

More and more people__________ science.

8.大自然的秘密是很有趣的.

The__________of__________ are very interesting.

9.人们把这些树全部砍倒了。

People have__________ all the trees.

10.这些树几乎完全被覆盖了。

These trees__________ almost completely.

It was an ________soccer game. The soccer fans were very _____.

A.exciting, exciting B.exciting, excited C.excited, excited D.excited, exciting

A: Can you go to the concert with us?

B: ________.

A.I’d love to B.I’d like C.I’d love D.I’d like to

—_________ we keep the room clean enough all the time? —No, you _________.

A.Must; doesn't have B.Do; don't have to

C.Must; don't have to D.Must; mustn't