• 2021-04-14
    17. ________ several hypotheses have been made for the changing of the climate in the area, no conclusive evidence supports any of them.
  • Although

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      4. We ________ on it for several hours but we have not yet reached any conclusion. A: A. work B: B. are working C: C. have been working D: D. have been worked

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      ______ it______ for your help,I couldn't have made any progress. A: Had; not been B: Should; not been C: Did; not been D: Not; be

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      _____ it _____ for your help, I couldn’t have made any progress. A: Were; not B: Had; not been C: Should; not been D: Did; be

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      It would seem that Miller cannot have been on friendly terms with the gardeners there, or he would have made a ()of visiting them. A: move B: use C: point D: remedy

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      Why can’t Mike find his cigarettes A: He doesn’t have enough time to look for them. B: Pat hid them somewhere in the room. C: The cigarettes have been smoked out. D: The cigarettes have been thrown away.