The warning we were given as children ________ an apple a day keeps the doctor away may,in fact,have a scientific explanation.
---- Isn’t it hard to drive downtown to work? ---- Yes, that’s why I ____ to work by train.
---Why you are so worried? --- I ___for my little son all the afternoon, I don’t know why he hasn’t come back so late.
--- Do you want really to buy it?---- _____ I’ m willing to pay _____price you ask.
It is suggested that __big event like Russian Year in China should benefit _____relationship between the two countries.
If it is convenient ____you , I want to ask you to help me repair the roof of the kitchen. on Friday .A. to B. for C. with D at