18．She was supposed ______ at home at the moment，but her mother found her in the park．（　�。�
A．to be readingB．readC．readingD．to have read

分析 她本應(yīng)該在家里讀書(shū)，但她媽媽發(fā)現(xiàn)她在公園里．

解答 答案：A
本題考查固定短語(yǔ)be supposed to do意思是應(yīng)該做某事，根據(jù)句意可知，她應(yīng)該此刻正在家里讀書(shū)，所以需用be supposed to be doing，表示應(yīng)該正在做某事．

點(diǎn)評(píng) 考生需掌握動(dòng)詞不定式進(jìn)行時(shí)的用法表示正在做某事．

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