人体是有机整体的，其“五脏六腑之大主”是（）。
A.脑
B.心
C.五脏
D.经络
E.肾
参考答案：B
— Do you have post cards?
— _____________________[ ]
A. Yes, you have.
B. No, I haven't.
C. Yes, I do.
There are two books _____ the sofa. [ ]
A. in
B. at
C. on
D. of
