Question

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

A. why B. because of C. because

Answer 1

【答案】C

【解析】

这题考查原因状语从句的用法：because引导原因状语从句，句意是：因为宠物狗死了，小女孩感到难过。Because of是介词短语，后面是接名词。