问题
选择题
.
Playing with a cell phone, he suddenly ________ the teacher staring at him.
A．knew of
B．became aware of
C．reflected
D．aware for
答案
答案：B
考查短语辨析。knew of 了解，became aware of 意识到，reflected 反映，句意：他在玩手机，他突然意识到老师正在盯着他。所以选B。