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 單選:BCDCA. CDACD. ABBAC 單項(xiàng)填空精選6 (共15小題,每小題1分.滿分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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