Question

【题目】安德鲁的妈妈看上去很年轻，经常被错认为是他姐姐。

Andrew’s mother looks so young ________ his sister.

Answer 1

【答案】that she is often mistaken for

【解析】

此句用“so…that…”引导的结果状语从句，表示“看上去如此年轻，以至于经常被错认为是他姐姐”；从句的主语是she代替Andrew’s mother，是第三人称单数；表示“错认”用动词短语mistake…for…;此处的谓语动词是一般现在时的被动形式is often mistaken for。故答案为that she is often mistaken for。