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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 w*w*w*k*s*5*u*c*o*m 1-5 BCDCA 6-10 CDACD 11-15 ABBAC 【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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