Is Jack still live here —No, he _______to London already.

What were you doing when she dropped in—I for a while and_________ some reading

I think students should finish their homework first before doing other things.—________. Study is the first thing.

Parents and children should communicate more to _____ the gap between them so that they can understand each other better.

Mrs. Black isn’t used to _________ by sea and she used to _________ sick a lot.