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【題目】It long before we the result of the experiment.

A. will not be; will know B. is; will know

C. will not be; know D. is; know

【答案】C

【解析】

句意:不久我們就會知道實驗的結果。考查動詞時態(tài)辨析題。本句是固定句型“It (will) be +一段時間+before從句結構,表示“要不了/沒有多久就會……”,時態(tài)是主將從現(xiàn)。根據(jù)句意結構,可知選C。

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