I could have turned to Mr. Smith for help, but he ______ too busy then. A．is B．was C．should be D．has...
2023-01-05 22:49:05 91次 湖南师大附中高二年级模块六英语模块结业考试 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I could have turned to Mr. Smith for help,
but he ______ too busy then.
|
A．is
|
B．was
|
C．should be
|
D．has been
|
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