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