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    AIDS is said the biggest health problem in Africa over the past years. A. to be B. that it is C. to have been D. that it has been 单选:BCDCA. CDACD. ABBAC 单项填空精选6 (共15小题,每小题1分.满分15分) 【查看更多】

     

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    AIDS is said _________ the biggest health problem in Africa over the past years.

    A. to be B. that it is C. to have been　　 D. that it has been

     

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    AIDS is said _________ the biggest health problem in Africa over the past years.

    　 A. to be　　　　 B. that it is　 C. to have been　　 D. that it has been

     

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