单选题
He got injured because of his faulty brakes. He ______ to see if his brakes were working properly.
A、
must check
B、
should check
C、
must have checked
D、
should have checked
【正确答案】
D
【答案解析】
[解析] 本题是对过去发生事情的虚拟。表示本应该做什么，然而事实上却没有做，应该用should have done。故选D。
提交答案
关闭