If he __________, he would have passed the examination.
| A．had worked hard | B．worked hard |
| C．has worked hard | D．works hard |
----I’m sorry, but there is no smoking on this flight.
----Oh, I _____ that. Sorry, I won’t again.
| A．don’t know | B．didn’t know | C．won’t know | D．haven’t known |
— May I remind you that a Mr Li is waiting outside, sir?
—Oh, that is right, I ____ about it.
A. forgetB. had forgottenC forgotD. have forgotten
—My nephew will come tomorrow.
— But I’d rather he _____ the day after tomorrow.
| A．came | B．is coming | C．will come | D．had come |
—What happened?
—Well, the wind _____ the door open. I' ve already closed it.
| A．is blowing | B．has blown | C．blew | D．had blown |
I became a teacher in 1993. I _______ for 13 years by next summer.
| A．has taught | B．will teach | C．has been teaching | D．will have been teaching |