I'm not sure when the flight takes off.You ___look up the information on the Internet to make sureof it.A.may B.have to C.must D.might 选什么,为什么?

分类: 作业答案 • 2021-12-19 16:22:30

问题描述：

I'm not sure when the flight takes off.You ___look up the information on the Internet to make sure
of it.A.may B.have to C.must D.might 选什么,为什么?

答