问题
选择题
—Jenny took the 8： 00 bus to Guangzhou this morning.
—Really? She ________ 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
A 考察情态动词。句义：Jenny今天早晨乘坐8点钟的汽车去了广州。真的吗？她本可以乘坐9点的火车的。那更舒服安全。根据语境和句中的时态，可知是对过去情况的说明。应该使用情态动词的完成式。Could have done本可以做某事。故A正确。