—Jenny took the 8： 00 bus to Guangzhou this morning.
—Really? She the 9：00 train. It's much more fortable and safer to travel by train.
A. could have taken
B. should take
C. must have taken
D. can take
网友回答
(答案→)A. could have taken
B. should take
C. must have taken
D. can take
解析：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。