【題目】 They kept trying, and their efforts finally _____. They got enough money to _____ their debt.

A. are paid off; pay back B. paid off; pay off

C. are paid for; pay back D. paid back; pay off

【答案】B

【解析】

試題分析：考查動(dòng)詞短語(yǔ)。句意：他們繼續(xù)努力，他的努力最終得到回報(bào)，他們有足夠的錢(qián)來(lái)償還債務(wù)。Pay off 得到回到，pay back還清，故選B項(xiàng)；

考點(diǎn) : 考查動(dòng)詞短語(yǔ)

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