—How often do I need to feed the fish?－They food every day, or they will be
题型：不详难度：来源：
—How often do I need to feed the fish?
－They food every day, or they will be hungry.| A．must give | B．mustn’t give | C．mustn’t be give. | D．must be given |
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答案
| D |
解析
试题分析：句意：你多久喂一次鱼？他们每天都必须被喂食，否则他们会饿。主语they指鱼，是动作的承受者，故用被动结构：be + done,含有情态动词的被动结构：情态动词+ be + done，结合句意及句子结构，故选D |
举一反三
The garden _____ while they were away from here.| A．took good care of | B．was taken good care | | C．was taken good care of | D．was taking good care of |
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-----I haven’t seen Gina for a week.
-----Oh! She _______ Mt. Huang with her friends. She ________there twice.
A. has gone to; has gone B. has gone to; has been C. has been to; has been |
----What happened to your father?
----He_______ because of his drink-driving.
A. has caught B. is caught C. was caught |
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A、turn off B、are turned C、be turned off |
----Smoking should ____________ in school.
----I agree. It’s bad for our health.| A．be allowed | B．not allow | C．allow | D．not be allowed |
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