1)The pen ________ he is writing is mine. A. with which B. in which C. on which D. by which 2)They arrived at a farmhouse, in front of ________ sat a small boy. A. whom B. who C. which D. that 答案: 1)A. with which 这是“介词+关系代词”结构,常用来引导定语从句。with有“用”的意思,介词之后只能用which,,不能用that。with which在定语从句中作状语。即he is writing with a pen. 2)C. which 即in front of a farmhouse, in front of which在从句中作状语。
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