单项选择题
A. Left wondering B. Having left wondering C. Leaving to wonder D. Having left to wonder
The teacher came into the room, with his hands（）behind ...
单项选择题The teacher came into the room, with his hands（）behind his back.
A. being crossed B. having crossed C. crossed D. to be crossed
Tom is the man who always does （） best even in the most...
单项选择题Tom is the man who always does （） best even in the most difficult situation.
A. one's B. your C. their D. his
The earth revolves a little more rapidly （） it is close...
单项选择题The earth revolves a little more rapidly （） it is closer to the sun.
A. whether B. whereas C. although D. when
