Rick has learned a lot about Chinese culture _____ he came to China.
| A．before | B．when |
| C．until | D．since |
﹣﹣﹣May I park my car here？
﹣﹣﹣No，you _______.Can't you see the sign 
？（ ）
| A． |
mustn't |
B． |
wouldn't |
C． |
needn't |
D． |
couldn't |
Don't worry.We will meet next Monday _______ the project again.（ ）
| A． |
discuss |
B． |
discussed |
C． |
discussing |
D． |
to discuss |
Now people can send messages with their voices.It is _______ than using a keyboard.（ ）
| A． |
fast |
B． |
faster |
| C． |
fastest |
D． |
the fastest |
Mike moved to China with _______ family two years ago.（ ）
| A． |
he |
B． |
him |
C． |
his |
D． |
himself |
I often do volunteer work in the library ______ Sundays.（ ）
| A． |
at |
B． |
in |
C． |
on |
D． |
for |