--Have you decided where to go for your summer vacation?Not yet. We go to Mount Lu. It

问题补充：

--Have you decided where to go for your summer vacation?

--Not yet. We go to Mount Lu. It is a good place for vacation.

A. may

B. should

C. need

D. must

答案：

(答案→)A. may

B. should

C. need

D. must

解析：情态动词辨析. May可以，可能; should应该; need需要; must必须,一定;句意:你们决定了这个暑假去哪儿了吗?——还没有。我们可能去芦山。那是一个度假的好地方。故选A。