他现在正在为英语考试做准备！
He is _____ ______ for the English test now.
喝杯茶怎么样？
What ______ ______ a cup of tea?
不要让孩子们在街上玩！
_______ the children _______ _______ play in the street.
This course is designed _______ an introduction to the subject.
A.to B.for C.as D.about（多谢老师们）
