The audience were deeply impressed by hisspeech with tears _________ their eyes.

The mayor will go to Beijing by train _____ by air.

I visited the Qinhu Lake last Sunday. —______ Why didn’t you tell me earlier

In the north people sometimes tie straw ropes (草绳) round the trees in winter to ______ them from the cold.

______you didn’t know the rules won’t be an excuse for your failure to report.