题目内容：

按要求完成句子。

1.Twice a year they go to help count the birds there.(对划线部分提问)

______ ______ do they go to help count the birds there？

2.This area gives food and shelter to wildlife. (改为同义句)

This area______ wildlife ______ food and shelter.

3.They went to Beijing to stay for a short time. (改为同义句)

They went to Beijing for______ ______ ______.

4.Mary works in Tonghua the whole year. (改为同义句)

Mary works in Tonghua_______ _______ _______.

5.Birds catch them for food easily. (改为同义句)

______ ______ ______birds______ catch them for food.