﹣We can’t_____making a plan．Clean﹣up Day is only two weeks from now．﹣Yes，I think so．

t by cutting down staff _ _she saved the firm —– No, it was by improving work efficiency.

I______ thank you too much for all your help to my son while we were away from home. [ ]

han 800,000 Chinese overseas students havereturned in the last five years, with the annual number ______ by an averagerate of 36 percent each year

He has worked in the city _______ three years ago while his wife has been here______only one month.