解析: "his eyesight was beginning to fail"是"he found it increasingly difficult to read"的原因, 因此本题应选用可以表示原因的连词for引导原因状语从句。 答案: B 误区提醒 除了because , since , as , for这四个词的辨析外,对于because 从句与 because of短语...
如果which或whom在定语从句中作介词宾语,那么该介词可以置于从句前,这种定语从句修饰人时,介词后只用whom,修饰物时只用which,不能用that,因为介词后接that意思发生改变,如in+that=because引导原因状语从句,另外介词+which还可等同于关系副词,如in/on, at+which=when/w...
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