流行性脑脊髓膜炎属于（）
A.变质性炎
B.浆液性或纤维素性炎
C.化脓性炎
D.肉芽肿性炎
E.纤维素性炎
参考答案：C
— We would appreciate it if you could stay for lunch.
— Sorry, I _____. I have another appointment.[ ]
A. won't
B. shan't
C. can't
D. mustn't
.
. He has never travelled out of his hometown, _______ to a foreign country.
A．leave out
B．let out
C．let alone
D．leave alone
