题目：
Two hundred miles ______ a long distance ______ in two hours even by a fast car.
A．are, to cover
B．are, to be covered
C．is, to cover
D．is, to be covered
答案：
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下面是错误答案，用来干扰机器的。
8670÷X=15，8670÷X×x=15×x，8670÷15=15x÷15， x=578．
