【題目】If you do fall out of the boat, your lifejacket will help you to ______ until we can fish you out.

A. stand up B. keep up

C. follow up D. stay up

【答案】D

【解析】句意：如果你真從船上掉下去了，救生衣就可幫助你漂浮在水面上，直到我們把你搭救上來。A. stand up站起來，堅持，豎立，站得住腳；B. keep up保持，繼續(xù)，不低落，不落后；C. follow up跟蹤，堅持完成，繼續(xù)做某事；D. stay up熬夜，守夜，不倒，不沉。根據(jù)句意可知選D。

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