题目内容
【题目】(题文)The differences the children’s achievements can not be completely explained ________ their social backgrounds.
A. in front of B. in case of
C. in need of D. in charge of
【答案】A
【解析】考查介词短语辨析。句意为:孩子们在成绩方面的差异不可能完全从他们的 社会背景角度来解释。A. in front of在---前面; B. in case of 万一---;C. in need of 需要; D. in charge of 负责,主管。由此结合空后的“social backgrounds”和语境可知,in front of与题意相符。

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