单选题
The watch has disappeared; who ______ it?
A、
should have taken
B、
could have taken
C、
must have taken
D、
would have taken
【正确答案】
B
【答案解析】
[解析] …who could have taken it?此句表示不肯定的推测，意为：谁有可能拿走它呢?
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