The doctors said it would be months Yao Ming was fit enough for regular training.A. thatB

问题补充：

The doctors said it would be months Yao Ming was fit enough for regular training.

A. that

B. when

C. since

D. before

答案：

A. that

B. when

C. since

(答案→)D. before

解析：考查连词.句意:医生说在姚明足够适合参加定期训练之前会有几个月的时间.故选D.在……之前。