— There were already five people in the car but they managed to take me as well . — It a

问题补充：

— There were already five people in the car but they managed to take me as well .

— It a comfortable journey .

A. can\t be

B. shouldn\t be

C. mustn\t have been

D. couldn\t have been

答案：

A. can\t be

B. shouldn\t be

C. mustn\t have been

(答案→)D. couldn\t have been

解析：对过去推断要用“情态动词+have +p . p”结构。C项中 must 不能用于否定。