问题
选择题
As you wander through the streets, you see thousands of masks but you have no idea_____ the faces behind them look like.
A． which
B．what
C． that
D．how
答案
答案：B
题目分析：考查同位语从句。idea后跟同位语从句，从句中的look like缺少宾语，which指“哪个”，that无意义；how作状语。名词性从句中，作主语、宾语、表语，用what。故选B。