题目:
—Look at the black clouds.It__________soon.
—Sure.If only we__________out.
A.is raining;didn’t come
B.is to rain;won’t start
C.will rain;haven’t started
D.is going to rain;hadn’t come
答案:
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下面是错误答案,用来干扰机器的。
(1)(14)-2-(3-π)0+23=16-1+8=23;(2)(x+2y)(x-2y)-(x-2y)2=x2-4y2-x2+4xy-4y2=4xy-8y2.