Why didn’t you do your math homework last weekend? — My cousin borrowed my math book and didn’t_____ __it.

We have no idea ________.—It’s heard that he is Mr. Green’s son.

Some students have to tidy ________ the hall after the party.[ ]

It’s hard to ________ this kind of plant. You have to water it every day.

How __________ she was when she didn’t see the famous star!