题文
Never before ______ so highly successful in his attempts to forecast the weather accurately on a small scale.
| A．man has been | B．man is |
| C．has man been | D．will be man |
推荐试卷
Never before ______ so highly successful in his attempts to forecast the weather accurately on a small scale.
| A．man has been | B．man is |
| C．has man been | D．will be man |
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