劳动争议调解委员会主任由（ ）担任。

A．职工代表

B．政府代表

C．工会代表

D．用人单位代表

Directions :

The following are three pictures of different ways to spend the summer holiday. Write an essay of 160～200 words based on these pictures. In the composition you should:

1) describe the pictures

2) discuss the advantage and disadvantage of them, and

3) give suggestions.