Which of the following sign will you probably see in a reading room of a library?
| A． |
|
B． |
|
C． |
|
D． |
|
The telephone _______ by Alexander Graham Bell．（ ）
A．was inventedB．invents
C．invented
I _______ Anna since three years ago．（ ）
A．knewB．knowC．have known
If I go to the movie， I _______ my homework on time．（ ）
A．didn't finishB．don't finish
C．won't finish
I like Chinese， _______ I don't like math， because it's not easy to learn it well．（ ）
A．andB．butC．or
I think it's impolite _______ others waiting．（ ）
A．to keepB．keepingC．keep
