Question

【题目】--Miss Green's new dress looks smart.

-I wonder it is made of.

A. how B. where C. when D. what

Answer 1

【答案】D

【解析】句意：——格林小姐的新裙子看起来漂亮。——我想知道它是用什么制成的。此处be made of后面缺少宾语，故用代词what 充当，故选D。