题目内容


--Who is the person talking with you just now?
-- Well, if you ______ know, his name is David.
A.mayB.canC.mustD.shall
C
考查情态动词:A. may 可以,B. can能够,  C. must 必须,偏要D. shall将会,句意是;--刚刚和你说话的是谁?--如果你偏要知道,是大卫。选C。
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