3．Do you know the lady? She is holding a baby in her arms.

　Do you know the lady ________ a baby ________ ________ ________?

2．Marx began to study Russian when he was over firty.

　Marx began to study Russian when he was ________ ________ ________.

1．We found that it was impossible to get everything ready in such a short time.

　We found ________ impossible ________ ________ everything ready in such a short time.

10．They are passing new laws to prevent the pollution of the ________(环境).　

9．Here are ________(说明)for running this kind of instrument.

8．It is necessary to clean r　　 ground before planting crops.

7．To p　　 a field is to turn over the soil in it with a p　　 .

6．Chemical f　　 are used to help these vegetables grow well.

5．There was a s　　 of grain because of poor crops.

4．At the conference they took the opportunity to e　　 views and experiences.