单选题 It has been rather costly to install the machinery, but it will prove to be worth the money______.

【正确答案】 A
【答案解析】[考点] 词组辨析 A)in the long run“从长远来看”;B)at long last“经过(种种)延误,努力等,终于”;C)in conclusion“最后”;D)at the end 后面常加of。
[译文] 安装机器设备相当昂贵,但是从长远来看,所花的钱将是值得的。