【題目】You will be out of date______you keep on studying from time to time.

A.untilB.althoughC.orD.unless

【答案】D

【解析】

句意:除非你不斷地學(xué)習(xí),否則你會(huì)落伍的。

考查連詞辨析。until直到; although盡管,雖然;or否則,要不然; unless除非,如果。根據(jù)“you keep on studying from time to time.”可知,這里是unless引導(dǎo)的條件狀語(yǔ)從句。根據(jù)題意,故選D

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