二:Multiple choice 21.—Shall I give you a ride as you live so far away? —Thank you. _________. A.It couldn’t be better B.Of course you can C.If you like D.It’s up to you 22.—Tom is never late for work. Why is be absent today? —Something ________ to him. A.must happen B.should have happened C.could have happened D.must have happened
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