16.　 I really don’t know ______ it is going to rain or not this afternoon.

15.　 _____ my father ______ my mother is a doctor. They are teachers.

14.　 _____you have a few more days’ rest,　 you’ll feel better.

13.　 Please call me _______ you need my help.

12.　 My little cousin can _________ read ________ write.

11.　 She got a　 “C” in English test, ________ she had tried his best.

10.　 Put on your coat, ________ you will catch cold.

9.　　　 There are a lot of stories about the UFOs, _______ no one knows whether they are true or not.

8.　　　 Take some medicine, ________ you will feel better.

7.　　　 Come here early, ________ you can’t see him.