—I just can't stop worrying about the result of the English examination．
—__ _．There's nothing you can do now but wait．
| A．Take your time | B．Take it easy |
| C．Don't mind | D．Don't mention it |
I won’t tell the student the answer to the math problem until he ______ on it for more than an hour.
| A．has been working | B．will have worked |
| C．will have been working | D．had worked |
Ladies and gentlemen, please fasten your seat belts. The plane _______.
| A．takes off | B．is taking off |
| C．has taken off | D．took off |
I _______ in London for many years, but I’ve never regretted my final decision to move back to China.
| A．lived | B．was living |
| C．have lived | D．had lived |
I was giving a talk to a large group of people, the same talk I _______ to half a dozen other groups.
| A．was giving | B．am giving |
| C．had given | D．have given |
“You’ve left the light on.” “Oh, so I have. _____ and turn it off.”
| A．I’ll go | B．I’ve gone |
| C．I go | D．I’m going |