Ithasbeenrathercostlytoinstallthe

发布时间:2020-07-27 00:09:26

It has been rather costly to install the machinery, but it should ________ in the long run.A.pay offB.pay forC.pay backD.pay up

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A解析pay off付清,取得成功;得到回报;pay for为……付款;为……而受苦;pay back偿还;pay up(指不情愿地)付清欠款。根据句意“安装机器花费很大,但从长远来看是合算的”。
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