—Who do you think will get the first prize?
—Mary, of course. She ________ for the competition for months.
| A．is preparing | B．was preparing |
| C．had been preparing | D．has been preparing |
They were all very tired, but ________ of them would stop to take a rest.
| A．any | B．some | C．none | D．neither |
Come and see me whenever ________.
| A．you are convenient | B．you will be convenient |
| C．it is convenient to you | D．it will be convenient to you |
--The plane is due to take off at 7∶50 from the airport.
--________ we fail to arrive there in time?
| A．What if | B．As if | C．Even if | D．Only if |
--They ________ out the problem, but failed.
--What a shame ! I never thought it was going to happen like that.
| A．managed to work | B．managed working |
| C．sought working | D．sought to work |
--Let’s go there by taxi.
--It’s not far from here, I prefer ________.
| A．walking to take a taxi | B．to walk rather than take a taxi |
| C．walk to taking the taxi | D．to walk rather than to take a taxi |