Have you decided where to spend your summer holiday?---Not yet.Wego to Qingdao.A. mustB. s

问题补充：

Have you decided where to spend your summer holiday?

---Not yet.Wego to Qingdao.

A. must

B. should

C. need

D. may

答案：

A. must

B. should

C. need

(答案→)D. may

解析：考查情态动词的用法。must“必须”；should“应该”；need“需要”；may“可能”。根据答语中的“Not yet.”可知，还不确定去哪里度假。故用may表示不太肯定的推测。故选D。