Color TV was first shown in 1929. It took more than two decades, ________， until 1951, for
color broadcasts to begin in the USA.
A. though B. therefore C. otherwise D. anyway
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 |
— 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 |
I ____ take the job . No one ____ stop me .
| A．will ; shall | B．will ; may | C．should ; will | D．shall ; may |