Helping others is a habit, you can learn even at an early age．
| A．it | B．that | C．what | D．one |
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 |