Never before ___ so highly successful in his attempts to forecast the weather accurately on a small scale.
举一反三
- 5. Never before _____ so highly successful in his attempts to forecast the weather accurately on a small scale. A: man has been B: has man been C: man is D: is man
- Never before so highly successful in his attempts to modify the weather on a very small scale. A: man has been,man is,has man been,will be man
- Never before ____ so highly<br/>successful in his attempts to change slightly the weather on a very<br/>small scale. A: man has been B: has man been C: will be man D: man was
- Man has been highly successful in his attempts to ________ the weather on a very small scale. A: erase B: repair C: resemble D: modify
- 6. The weather is so high up in the mountains that the forecast is sometimes not reliable.(change)