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 --Wasitbecauseofhislaziness

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問題詳情:

 --Wasitbecauseofhislaziness

 - -Was it because of his laziness_______ he didn't do the experiment successfully? 

---No, it was because of his carelessness.

A. that                 B. while                       C. for                         D. as

【回答】

A

知識點:連詞

題型:選擇題

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