【題目】________ the program, they have to stay there for another two weeks.

A. Not completing B. Not completed

C. Not having completed D. Having not completed

【答案】C

【解析】

試題考查現(xiàn)在分詞的完成式做狀語，因為他們是先沒有完成任務，然后不得不在這兒再待兩個星期。表示從句的動作先于主句的動作，要用現(xiàn)在分詞的完成式，否定式是：not having done。選C。

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