I think AI （人工智能） in many fields will to help us solve many problems in the future．（ ）
A．used, be usedB．is used, be used
C．used, useD．is used, use
Tom and Jerry really love each other _______ they fight a lot.（ ）
| A． |
if |
B． |
though |
C． |
until |
D． |
because |
_______ at people when you talk.This is a polite way of communication in China.（ ）
| A． |
Look |
B． |
Looking |
C． |
To look |
D． |
Looked |
Lingling met her favourite presenter while she _______ the radio station.（ ）
| A． |
visits |
B． |
will visit |
| C． |
is visiting |
D． |
was visiting |
﹣﹣﹣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 |