题目内容
During the class, Tom slipped out of the classroom ____the back door so as not to be found by the teacher.
A. across B. in C. by D. beside
【答案】
C
【解析】介词辨析。By表示方法和手段,意为:通过;结合句意可知C正确。句意:在上课期间,Tom从后面溜出教室,以免被发现。
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