Once formed, the bad habits are hard to __________.
| A．move | B．get rid | C．remove | D．place |
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 |
In___________week or so, I will be among unemployed, I am afraid.
| A．a ;不填 | B．a ; the | C．the ; 不填 | D．the ; the |