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 |
B
考查时态。句意:我本来能够帮助他,说实话,我太忙了。结合语境可知下文描述的是过去的状态,故用一般过去时态,选B。
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| A.am | B.was | C.have been | D.had been |