----Did you go to Jack’s birthday party?
---No, I____.
A. am not invited B. wasn’t invited
C. haven’t invited D. didn’t invite
--- Did I lock the door when I went out?
--- Yes, you did. I saw you _____ it.
A. locking B. lock
C. to lock D. locked
---You have to work very hard in your job, don’t you?
----Yes, but I don’t mind that. I _____ hard.
A. used to work B. am used to work
C. am used work D. am used to working
--- I don’t know ______ my telephone number.
--- Through a friend of mine.
A. what did you get to know B. what you got to know
C. how did you get to know D. how you got to know
---David，is that man your Chinese teacher?
---It___________ be him．He’s having a meeting．
A．mustn’t B．can’t
C．needn’t D．won’t
---Why weren’t you at the meeting?
---I ____for a long distance call from my sister in America.
A. was waited B. was waiting
C. has waited D. have been waiting