There are certain _______when you have to interrupt people who are in the middle of doing something.
| A．chances | B．situations | C．occasions | D．opportunities |
It is strongly suggested that measures________factories to pour waste into rivers by the government.
| A．be taken to prevent | B．be taken to forbid | C．are taken to prevent | D．are taken to forbid |
— How long do you think it will be _______ the USA recovers from the losses of the financial crisis?
— Perhaps four or five years.
| A．when | B．since | C．that | D．before |
When________there, the postman found the door locked and then stopped ______the letter under it.
| A．reaching;to stick | B．reached;to stick | C．reaching;sticking | D．reached;sticking |
This agreement will be signed by the managers_________.
| A．concerns | B．concerning | C．concerned | D．to be concerned |
“All of them are not fond of the film” means “_______of them are fond of the film”.
| A．None | B．Some | C．Neither | D．Most |