—If you have any trouble, be sure to call me. — ______.
| A．I am glad to hear that |
| B．I will. Thank you very much |
| C．I have no trouble |
| D．I will think it over |
— Kitty, do you know ______?
— Sure, about forty minutes.
| A．when did their class meeting begin. |
| B．where their class meeting was held |
| C．how often their class meeting is held |
| D．how long their class meeting will last |
The mobile phone has changed people’s life a lot ________ it was invented.
| A．until | B．since | C．before | D．after |
I have so much homework to do that I don’t know ________.
| A．what to do with | B．how to deal with it |
| C．what to deal with it | D．how to do |
---- You don't know what great difficulty I had _____ to get the two tickets.
---- But the film is really worth_______ twice.
| A．managing; seeing | B．to manage; seeing |
| C．managing; being seen | D．managed; to be seen |
— You should be careful when ________.
— Yes, I will．I’d like to know when ________ to have a rest.
| A．driving; stopping | B．driving; to stop |
| C．to drive; stopping | D．to drive; to stop |