Question

【题目】The little girl felt upset ____ her pet dog died.

A. why B. because of C. because D. what

Answer 1

【答案】C

【解析】

试题句意：因为宠物狗死了，小女孩感到难过。why 为什么；because引导原因状语从句，Because of是介词短语，后面是接名词。What什么。所以选C。