5．只有那时，我才有机会实现我的梦想。

____________　 ________ ________ will I have a chance of achieving my dream．

4．他们说话而不做作业。

They talk ____________　 ____________　 ____________ homework．

3．于梅似乎变了许多。

____________　 ________________　 ____________________Yu Mei has changed a lot ．

2．如果不能解决问题，我们就很容易变的忧心忡忡。

And unless we___________　 ___________ our problem，we can easily become____________．

1．大声朗读来练语音怎么样?

　 What abou____________aloud to____________　 ____________？

The students(1) _____________ (have)their chemistry class．Miss Li(2) ________(tell)what water was like．After that，she(3) _______________(ask)her students，“What’swater?”No one said anything．After a minute，Miss Li asked again，“Why don’t you answer my question？(4) ________________ I(5) ________________(not tell)you what water is like?”

　　 Just then．a boy put up his hand and(6) ________ (say)，“Miss Li．you(7) __________(tell)us that water(8) ___________ (have)no colour and no smell．But where can we find such kind of water？The water in the river behind my house is always black and it has a bad smell．”most of the children(9) ___________ (agree)with him．

　　 “I’m sorry．children．”said the teacher，“Our water(10) ____________(get)dirtier and dirtier．That’s a problem．”

10．Be___________________ (小心)of the dog that does not bark．

9．I'd give some money to medical___________________(研究)．

8．Our___________________(友谊)with each other has developed quickly over the past weeks．

7．Don’t ___________________(浪费)anything，especially time．