Cindy shut the door heavily and burst into tears. No one in the office knew__________she was so angry.
They will start their project ____at helping the poor children to be educated in China's west.
Could it be in the restaurant in ___ you had dinner with me yesterday ___ you lost your handbag.
By now, when one makes a large purchase, he should have ___ opportunity to change his mind.
It is a long time ___
Sam _______some knowledge of the computer just by watching others working on it.