You didn't let me drive. If we __________ in turn, you __________ so tired.
Xiamen is ___________ most beautiful coast city and I believe I will come for__________ second time.
The sports meet, originally due to be held last Friday, was finally ___________ because of the bad weather.
I have kept that picture _____ I can see it every day as it always reminds me of my university days in London.
The room is in a terrible mess; it __________ cleaned.
--- How about the book you are reading? --- Good indeed. It ___________ many problems we have come across in our study.