题目内容：

 

1.Tom is _________ (happy). He cannot find his new camera. Where is it?

2.The climbers tried their best and reached the top of the mountain  ________  (success) at last.

3.Do you know that _________ (wolf) are group animals?

4.Children, please look after _________ (you) when your mother is not at home.

5.The _________  (one) of January is New Year's Day.