Alice was supposed _____ at home, but her mother found her surfing the Internet．
题型：不详难度：来源：
Alice was supposed _____ at home, but her mother found her surfing the Internet．| A．studying | B．to be studying | | C．to have studied | D．studied |
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答案
| B |
解析
| 考查不定式的形式。Be supposed to do sth应该做某事；本题使用进行时表示不定式动作和谓语动词同时发生。句意：Alice被认为正在家里学习的，但是他的妈妈发现她在上网。本题的be supposed to be doing sth被认为正在做某事。故B正确。 |
举一反三
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