I could have helped him out, to tell the truth, I _____ too busy. A．am B．was C．have been D．had been...
2023-01-31 01:48:25 84次 2010届高三英语冲刺单项选择精选（二） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I could have helped him out, to
tell the truth, I _____ too busy.
|
A．am
|
B．was
|
C．have been
|
D．had been
|
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