单选题
Chief Engineer Mike Myers' expertise ______ chemical materials has enabled him to move to the very top of his field.
A、
against
B、
for
C、
on
D、
in
【正确答案】
D
【答案解析】
选择与expertise语意连贯的介词。expertise in表示“在…方面的专长”。答案是(D)in。
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