问题
选择题
— 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
D。
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。