高等继续教育 / 大学英语I
正确率:100%
题型描述: 单选题
He didn’t show up at the party yesterday. He ____ in the lab.
A.would have been busy working
B.must be busy wording
C.must be busy to work
D.must have been busy working
He didn’t show up at the party yesterday. He ____ in the lab.
A.would have been busy working
B.must be busy wording
C.must be busy to work
D.must have been busy working
参考答案: