If I went to the moon, I ______ bring somethingunusual back to the earth.

He used up late, but now he is used to up early.

Tom’s been sent to the USA for further study. What about his twin sister?— _____.How lucky they are![ ]

We shouldn’t________he trees in order to protect the environment．

Shehadjustfinishedherhomework_____hermotheraskedhertopracticeplayingthepianoyesterday.[ ]