单选题
The mechanic examined the car engine ______ but could find nothing wrong with it.
A、
throughout
B、
exactly
C、
thoroughly
D、
suitably
【正确答案】
C
【答案解析】
解析：thoroughly ad．彻底地，仔细地。throughout ad.到处，自始至终，贯穿全部地。exactly ad.确切地，精确地。suitably ad.合适地。
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