Please do me a favor-----_________ a seat for me in case the hall is too crowded.
A．to saveB．savingC．saveD．saved
C

試題分析：考查祈使句，句意：請幫我一個忙，為我留個座位，防止大廳太擁擠。破折號后面的句子，缺少動詞，是祈使句。選C。
點評：通過分析句子成分，這句話缺少謂語動詞，也省略了主語，用動詞原形，構(gòu)成祈使句，表示請求。
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