It was once called the Sea of Bamboo, but now only one fifth of the area ______ covered with bamboo, and sixty percent of other plants ______ taken the place of the bamboo.
I have no dreams ____ to have a happy life.
I’ll finish the job ____ I come across great difficulty.
——So you missed the meeting. ——____. I got there five minutes before it finished.
They prefer to spend time _____ rather than _____ in the street.
It was _______ the exam results were known _______ a lot of time on computer games.