The country has already sent up three unmanned spacecraft, the most recent__at the end of last March.
| A．has been launched | B．having been launched |
| C．being launched | D．to be launched |
He _____ his parents that he has failed in the exam.
| A．dares not tell | B．dares not telling | C．dare not tell | D．dares not to tell |
—The poor people lived near the highway.—_____ very noisy.
| A．It must have been | B．They must be | C．That might be | D．There must be |
As is natural, a man as old as he ______ be very forgetful.
| A．can | B．must | C．should | D．would |
You _____ pay too much attention to your reading skill, as it is so important.
| A．cannot | B．should | C．must | D．needn’t |
I _____ have written to him because he phoned me shortly afterwards.
| A．ought to | B．must | C．couldn’t | D．needn’t |