I really enjoyed your lecture , ______ there were some parts I didn’t quite understand.
-- 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.
_________difficult questions the teacher is asking! Only a few students can answer them!