—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．has been preparing | D．had been preparing |
相关试题
_________ to 100℃, water will boil.
| A．Being heated | B．Heated | C．Heating | D．To heat |
He __________ his aunt’s when he went to Wuhan on business.
| A．called on | B．called at | C．dropped in on | D．dropped in |
You’d better take something to read 
when you go to see the doctor __________ you have to wait.
| A．even if | B．as if | C．in case | D．in order that |
---- Tom, why are you late again?
---- Sorry, manager. My car _________ on my way to the office.
| A．broke up | B．broke down | C．broke out | D．broke off |
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