问题
选择题
-Jenny took the 8：00 bus to Guangzhou this morning.
-Really? He＿＿the 9:00 train. It's much more comfortable and safer to travel by train.
A．could have taken
B．should take
C．must have taken
D．can take
答案
答案：A
题目分析：考查虚拟语气：句意：--Jenny今天早上乘坐8点的公共汽车去广州了。--真的吗？他本可以乘坐9点的火车，乘火车要更舒服更安全。因为是过去的虚拟，排除BD项，Could have done本可以做却没有，Must have done过去一定做了，不符合句意，选A。