Look! Several people in the crowd seemed .
| A．to be fighting |
| B．to have fought |
| C．being fought |
| D．having fought |
—Did you read the book Who Stole My Cheese ?
—Yes. I___________it twice while in university.
| A．reads | B．read | C．had read | D．has read |
Can you think of some cases___________students know clearly he should listen to the teacher but can’t do that ?
| A．where | B．as | C．why | D．which |
Henry hurried to the library, only to find a notice at the gate, saying “No___________before 12:00 noon”.
| A．permission | B．commitment | C．possession | D．admission |
___________there are many different types of food, some animals spend their lives eating only one type.
| A．Since | B．Unless | C．Once | D．While |
—The light___________on for long.
—Oh, I am sorry , I will go and turn it off.
| A．has been left | B．has left | C．had been left | D．had left |