(2013·成都第二次诊断)—Where did you get this book?—I picked it up from a second­hand bookshop

发布时间：2020-08-17 09:32:19

(2013·成都第二次诊断)—Where did you get this book?
—I picked it up from a second­hand bookshop if you       know.
A. must
B. will
C. can
D. shall

网友回答

(答案→)A. must
B. will
C. can
D. shall
解析：选A　考查情态动词。if you must (do sth.)表示“如果你一定要(那么做)”，所以选A，表示“如果你一定要知道的话”。
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