Provided that they are fit, I see no reason why they _____ go on playing basketball for another four or five years.
| A．needn’t | B．shouldn't |
| C．mustn’t | D．oughtn’t |
56. _______ for our teachers, we’d never have been able to enter this university.
| A．Had it not been | B．Had it not |
| C．If it was not | D．If he had not been |
15. Some of the doctors are paid almost ______ as the nurses.
| A．twice as much | B．much as twice | C．as much twice | D．as twice much |
14. ______ I’m well again, I can go on with my work.
| A．Even if | B．As though | C．Ever after | D．Now that |
13. The club women gathered ______ clothes for people in the tsunami-hit countries.
| A．a great deal of | B．masses of | C．a large amount of | D．amounts of |
12. We can’t continue to pretend that the problem of homelessness doesn’t ______ in this city.
| A．exist | B．live | C．be | D．Survive |