There were already 4 people in the car but they managed to take John as well. It a comfor

问题补充：

There were already 4 people in the car but they managed to take John as well. It a comfortable journey.

A. can’t be

B. wouldn’t be

C. mustn’t have been

D. couldn’t have been

答案：

A. can’t be

B. wouldn’t be

C. mustn’t have been

(答案→)D. couldn’t have been

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