问题补充:
. You a taxi, for it was only about ten minutes’ walk to the station from the hotel.
A. mustn’t have taken;
B. mightn’t have taken;
C. needn’t have taken;
D. couldn’t have taken;
答案:
A. mustn’t have taken;
B. mightn’t have taken;
(答案→)C. needn’t have taken;
D. couldn’t have taken;
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