10.　 If we don’t help the wild animals in danger, they ______ (die) soon.　　　

9.　　　 If wolves ________ (be) in the wild , they ______(live) as family groups.

8.　　　 Tigers _______ (hunt ) for their own food if they _____ (live) in the wild.

7.　　　 if it _______ (rain ) , my father _____ (take ) me to school in his car .

6.　　　 We ________ (not have ) our sports meeting if the weather ____ (not be ) fine.

5.　　　 If it ______ (be) sunny tomorrow, I ______( walk) to school .

4.　　　 Please ask him ________ ( not watch ) TV before he finishes his homework.

3.　　　 It’s best _______ (read ) English in the morning .

2.　　　 The temperature _______ (fall) below zero in the night.

1.　　　 He _______ (teach ) us English well, doesn’t he ?