--Doyouhaveanyplansforthissummervacation?--I'mnotsure.I...

问题详情：

--Do you have any plans for this summer vacation?

--I'm not sure. I ___ take a trip to Taiwan. 

A. must                B. need               C. may                D. should

【回答】

C

知识点：情态动词

题型：选择题