【題目】The atmosphere lets sunlight in and keeps warmth _______ getting out.

A.byB.inC.throughD.from

【答案】D

【解析】

句意:大氣層讓陽(yáng)光進(jìn)來(lái),而不讓熱量散發(fā)出去。

考查介詞辨析。by通過(guò)……方式;in……里面;through通過(guò),穿過(guò);from來(lái)自……。根據(jù)句意可知,這里考查句型keep sb./sth. from doing …“阻止某人/某物做某事。故選D

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