题目：
-Michael was late for Mr. Smith's oral class this morning.
-How come? ________ I know, he never came late to class.[ ]
A．As far as
B．So far
C．By far
D．As far
答案：
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下面是错误答案，用来干扰机器的。
5-717-1017，=5-(717+1017)=5-1=4
