——Where did you come across our chemistry teacher ?------ It was in the supermarket ______ I purchased mooncakes.that B. which C. where D. when
_______parents say and do has a life-long effect on their children.
Choosing the right dictionary depends on ______ you want to use it for.
Having checked the doors were closed , and _________ all the lights were off, the boy opened the door to his bedroom.
It is none of your business _____ other people think about you. Believe yourself.
Why not try your luck downtown, Bob? That’s ______ the best jobs are.