Question

Jim didn’t realize his little sister was crying _____ what he had said.

A．because

B．because of

C．as

D．since

Answer 1

B

试题分析：考查连词和介词用法。ACD三项表示原因的时候，以后要接完整的句子做原因状语从句。只有because of后面要接名词或者名词性的短语做宾语，形成介词短语在句中做状语。本题的what he had said="his" words是指他所说的话。故B正确。
点评：本题是高一年级考查的重点内容，在于because of后面要接名词或者名词性的短语做宾语，形成介词短语在句中做状语。一定要辨别后面的内容是句子还是短语。