题文
_________，I'd have done it myself.
| A．If I would have known it | B．If I had have known it |
| C．Had I known it | D．Should I known it |
推荐试卷
_________，I'd have done it myself.
| A．If I would have known it | B．If I had have known it |
| C．Had I known it | D．Should I known it |
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