问题
选择题
---Have you seen Bill recently?
--- Oh, no! Nobody knows ______ he is! Everyone is looking for him.
A．where
B．what
C．who
D．how
答案
答案：A
题目分析：句意：最近你见过比尔吗？哦，没有。没人知道他在哪！大家都在找他。where在哪儿，what 什么，who谁，how怎么。根据 Everyone is looking for him.大家都在找他，可知不知他在哪，故选A.