—Have you ever visited the Water Cube? —Yes. When I served as a volunteer in Beijing, I it twice.

—Have you ever visited the Water Cube? —Yes. When I served as a volunteer in Beijing, I      it twice.

#102056

have visited

visited

had visited

had been visiting

推荐题目

 I ___ on my report next week so I won’t be able to meet you any day.

#103394

am working

will be working

was working

have been working

-- Could you give these books to Mr. Mackintosh?-- Certainly, ______ him about something else in any case, so it won’t be any bother.

#103819

I saw

I see

I can see

I’ll be seeing

I was sleeping when the telephone rang again.It was the third time that I ________ that night.

#99409

have been interrupted

had been interrupted

interrupted

had interrupted

Don’t call me at three to four o’clock this afternoon. I          the patient at that time.

#102550

am treating

have treated

will treat

will be treating

The fire was finally brought under control, but extensive damage _________.

#99352

is caused

was causing

had caused

had been caused

共5993题