In 1778, banks was elected ______ president of the Royal Society, ______ position he held for 42 years.
| A．the; the | B．a; a | C．不填; a | D．不填；the |
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The reason for their failure, you know, was _______ they didn’t get fully prepared for it.
| A．why | B．whether | C．that | D．what |
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. John promised his parents he _______ not smoke again, and he has not smoked ever since.
| A．would | B．could | C．should | D．might |
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My brother left home five years ago. I _______ nothing from him up to now.
| A．hear | B．heard | C．have heard | D．had heard |
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. The power to our region has been _______ by the heavy snow.
| A．cut off | B．cut down | C．cut away | D．cut up |
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. Though he graduated from a famous university, he was _______ failure as _______ teacher.
| A．a; a | B．不填; a | C．不填; the | D．不填 |