We have to finish so much work within two days. We can’t __________ to waste any time.

Could you tell me something about Zheng He?–Sure. He was a Ming Dynasty explorer __ the Chinese people are proud of.

Would you like to go to the amusement park? —-If Jack does, __________.

What a mess(杂乱)! Tony, you should ___________ your things to keep the room clean.—OK, Mum! I’ll do it at once.

Bob doing homework?—No, he isn’t. He is a letter.