By the time she_____体操比赛上 at the New York Good Will Games, she_________ a dedicated junior gymnast for eleven years.
| A．competed , have been | B．competes, had been |
| C．will compete, has been | D．competed , had been |
I talked for a long time , and in the end I ____ make her believe me .
| A．could | B．can | C．must | D．was able to |
. How ____ you be so careless ?
| A．can | B．will | C．would | D．may |
. — I sent him the dictionary by mail this morning .
—You ____ that; he''s coming tomorrow afternoon .
| A．needn''t have done | B．didn''t have to | C．needn''t do | D．mustn''t do |
In three months he ____ speak good English .
| A．can | B．can be able to | C．will be able to | D．may be |
The door ____ lock .
| A．can''t | B．may not | C．won''t | D．mustn''t |