5．Look !The cloud is getting　　　 and　　　 (越来越厚)．

4．Can you　　　　 (找出)the differences between the two pictures．

3．Wolves　　　 (围猎)if they are hungry．

2．You should say“sorry”to others if you　　　 (踩到)them．

1．We should build　　　 (建立更多的保护区)to protect wild animals．

10．What will you do if the bear　　　　 you?

9．Don’t　　　　 in public．Other people will not be pleased．

8．　　　　 are afraid of cats．

7．My grandma couldn’t look after　　　　 because she was too old．

6．Let’s discuss the　　　 questions together．I think they are very hard．