用所给词的适当形式填空。1. When              the car             (invent)?
2. What do you think              (be ) the most helpful invention?
3. A stranger was seen              (go) into the teacher"s office by the girl.
4. Knocking into players and falling down would be              . (danger)
5. I am              (save) my money so I can buy a new bicycle.
6.             (be) a volunteer is great.
7. I fix up bikes and give               (they)away to children.
8. I love places where the people are really              (friend)
9. I love singers              (whom) write their own music.
10. Teenagers should              (allow) to choose their own clothes.

Oh, dear! The key _______ the door _______ in the room. [     ]

A. with, forget
B. to, is left
C. by, forgot
D. with, is left

I think the older people must be ______ politely.

[     ]

A. talked about
B. said with
C. told about
D. spoken to

— The school looked quite different from it used to be. 
— Yes. Lots of trees and grass ______. [     ]
A. have planted
B. are planted
C. were planted
D. have been planted

— What a mess! 
— Hurry up! Something ______. The guests are coming. [     ]
A. must do
B. must be done
C. must be do

— I want a copy of today"s Guangzhou Daily. 
— Oh, sorry. They ______ out. [     ]
A. have been sold
B. can be sold
C. were not sold

— "Will you come to the dinner party?"
— "I won"t come unless Jenny             ". [     ]
A．will be invited
B．can be invited
C．invited
D．is invited

— Mary was heard            just now. What happened?
— John was telling a joke.[     ]
A．cry
B．to cry
C．laugh
D．to laugh

— Did you go to Ann"s birthday party last Sunday? 
— No, I ______.

[     ]

A. am not invited
B. didn"t invite her
C. haven"t invited
D. wasn"t invited

The man ______ to enter the building two hours ago. [     ]
A. was seen
B. is seen
C. has been seen
D. will be seen