________ that the Youth Olympic Games might be delayed due to severe air pollution, our government has made a promise to Jacques Rogge that they will spare no effort to settle the problem.

A．Warned

B．Having warned

C．Warning

D．Being warned

下图一为白化基因（用a表示）和红绿色盲基因（用b表示）在某人体细胞中分布示意图；图二为有关色盲和白化病的某家庭遗传系谱图，其中Ⅲ9同时患白化和色盲病，请据图回答：

Ⅲ12的基因型是（）；我国婚姻法规定，禁止近亲结婚，若Ⅲ10和Ⅲ12结婚，所生子女中发病率是（）