2. 外语
  3. When the engine would not start, the mechanic inspected all the parts to find what was at______.

When the engine would not start, the mechanic inspected all the parts to find what was at______.

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问题 When the engine would not start, the mechanic inspected all the parts to find what was at______.
选项 A、wrong
B、trouble
C、fault
D、difficulty
答案C
解析 这四个选择项只有fault与at能在一起搭配使用。at fault意为“有毛病”的，如：My memory is at fault．“我记错了(我想不起来了)”。in trouble“处于困境(苦恼，不幸)”，如：I am in great trouble．My little brother has fallen off a ladder and hurthimself．“我处于困境，我小弟弟从梯子上摔下来，受了伤。”wrong“出毛病”，如用wrong，应将at去掉，句子仍成立，即“…to find what was wrong”。difficulty“困难”，in difficulty“有困难”。
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