问题

15．I didn’t see your sister at the meetingIf she _______, she would have met my brother

A:has come
B:did come
C:came
D:had come

正确答案是：

同类题型

32．Many experiments_____before the research team was able to get theexact data to carry on project.

It’s always foggy these days in our city. That’s really terrible!— Yes, and I hope to plant trees. ______trees, ______ air pollution.

In a chemical change, energy cannot be created ,____.

Would it be_______for youto pick me up at four o’clock and take me to the airport?[ ]

c.None D. Neither