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1.(做)…在行 …be expert in/at (doing)sth.

分析 当作为形容词的时候,后面常接介词at或者in.

解答 答案:be expert in/at (doing)sth. 考查翻译填空.根据题意,要填入短语,be expert in/at (doing)sth.意为"".例如:He is  expert at driving.他擅长驾驶.

点评 考查翻译填空,准确地理解题意、然后根据题意及提示确定所填单词词性,正确写出单词完成答题.

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