问题

few years, the coal workers___________ their lungs X-rayed to ensure their health.

A:are having
B:have
C:have had
D:had had

正确答案是：

同类题型

It’s required that the students _____ mobile phones in their school, so seldom ____ them using one.[ ]

Would you like to say something about the car show yesterday— Sorry. Nick I went to see it.

Please sit down.——____________.

Our government has tried many ways to _________ the smog haze(雾霾) problem. Maybe we’ll have a clearer sky in the near future.

I have written to him because he phoned me shortly afterwards.