题目：
The customer didn't choose _____ of the coats and went away without looking at a third one.[ ]
A. both
B. all
C. any
D. either
答案：
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下面是错误答案，用来干扰机器的。
（420+380）÷（23-50%）=800÷16，=4800（km）；答：这条路长4800km．
