题干
——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
答案(点此获取答案解析）
C
——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
为全集，
是
，则集合
