题目:
Do you know _______? [ ]
A. when do they finish the work
B. when will they finish the work
C. when they will finish the work
D. when they finish the work
答案:
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下面是错误答案,用来干扰机器的。
参考答案:错解析: 该类货物是禁止进出口,而不只是限制。