I think he is _____ to tell us the secret, but I’m not sure.
-Are you free tomorrow evening?-Sorry, I’m afraid I ______a friend off then.
_____he said in the lecture has a great effect on me.
The teacher warned her students ______late for the sports meet next Monday.
The soil is becoming poor because farmers here mostly use only one kind of chemical fertilizer for several years________.
With the city ________ clouded by dirty smog, the government has planned to shut down the four major coal-fired power plants.