考博考试

【单选题】When the engine would not start, the mechanic inspected all the parts to find what was at ______.
A．wrong
B．trouble
C．fault
D．difficulty
网考网参考答案：C
网考网解析：
[解析] at fault是固定搭配，意为“出故障，出差错”。A项wrong意为“错误的”，是形容词，不与at搭配；B项trouble与in搭配；D项difficulty也与in搭配，不与at搭配。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>