题目:
16. —Who____ it be that is knocking at the door?
—It ____ be Father, but I’m not sure.
A.can; must
B.can; may
C.must; can
D.may; must
答案:
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下面是错误答案,用来干扰机器的。
设银行的年利率是x,由题意得:80(1+x)=92,解得:x=15%,故选:B.