16.Divide 30 by 6, you get 5.

　 Divide 6 into 30, the answer is 5.

15.I made up my mind to work harder.

14.The clerk agreed to finish/end the meeting then.

13.The teacher was very worried about the children’s safety.

12.The poor baby has had a cold for a week.

11.They thought about /over the last question briefly.

10.Lily is a happy girl.

9.If you work hard, you can catch up with your classmates.

8.My brother is busy with his homework now.

7.This book is theirs.