Was it through Mary , ____ was working at a high school , _____ you get to know Tom ?

eatest pleasure I know is to do a goodaction quietly, and to have it _____ by accident

I called you last night, but nobody answered.—Oh, I usually___off my cellphone by 9:00 p.m

_he lives in a large flat and owns much money, he doesn’tseem as happy as before．

It surprised us all ______ Kate made such big progress in this final exam.