—What are people supposed to do when they meet for the first time in China?—They are supposed to _______.
Things made by hand are usually more expensive than _________ produced in factories.
-- Have you finished your homework yet? -- No, not yet. I think it’ll take me __________ half an hour.
-Do you think students should be allowed to do their homework with music on? --__________. If so, they can’t concentrate on the study.
Which of the following means “can be recycled”? A B C D
-- Hello, this is Jack. May I speak to Tom? -- Sorry, he isn’t in at the moment. If he _______ back, I’ll ask him to call you back.