【题目】What disappointed us was that their determination finally _____.
A.ran outB.kept outC.used upD.ran out of
在线课程【答案】A
【解析】
考查动词短语词义辨析。句意：使我们失望的是他们最终丧失了决心。A. ran out耗尽，用完；B. kept out阻止进入，挡住；C. used up用完了的，筋疲力尽；D. ran out of用完，用尽。表示决心用完，用run out；短语run out of后接宾语。故选B项。