Can you believe that in ____ a rich country there should be ___many people.
It is very difficult to _____ the meaning of a word without a context.
How much is the round-way _____ by air from Beijing to Nanjing?
It was because of his carelessness _____ he didn’t pass the entrance exam.
We were disappointed _____ that the match had been cancelled.
—What was the party like?—It was years _____ I enjoyed myself so much.