It's very kind____ you to repair the bike ____ me.
We're all ready to put it into operation. ______, we're going to take action as fast as possible.
The big snow caused great _______to the people living in the south of China, ________some of them homeless.
Mr. Smith, ______ in the factory for thirty years, is on the way back to his village.
—How was that? —I was chatting on line _____ the power went out.
Our teacher always speaks slowly and clearly in class _____.