Xi’an was the last city ______ he visited when he came to China.
Mary had to call a taxi because the box was_______ to carry all the way home.
When ______from top of the hill, our school looks small.
Tom went to his teacher for ______ on how to work out the problem.
This is his only request that the room ______ after being used.
Hearing the news about the crash of Air France Flight 447, he became very concerned _______ his daughter on board.