He was seriously injured．He lay on the ground, _______ to stand up．
A．was unable B．being not able
C．unable D．being able not
---Thanks for your help, but can you do me one more favor, please?
---____ , sir. What’s it then?
A. Just a minute B. At your service
C. That’s right D. It’s my pleasure
He is a man of few words, and seldom speaks until _______ to.
A. speaking B. spoken C. speak D. be spoken
-- May I smoke here?
-- If you____, that's the smoking section over there.
A. should B. could C. may D. must
---How do you find James Cameron's 3D version of Titanic?
---Fantastic! It can't be _______ and has brought us a wonderful experience.
A. more impressive B. as impressive
C. most impressive D. so impressive
It was the belief ____ Alex Haley could find his root in Africa ____made him decide to go to Zombia．
A． /, which B．which, that
C． that ,which D．that ,that
