核心词汇
1．When I began to sing，he laughed and made me ____________ (尴尬)．
2．We have just received ______________ (说明)that we must hand in all our baggage in no time.
3．Their ____________ (态度)towards me shows that they don’t like me.
4. He was chosen as an ____________ (助手)to help Mr.Brown finish his research.
5．They had a m____________，but they have become friendly again recently.
