请教两题，多谢！

Q17: GWD-4-2

In Greek theology the supreme being was Esaugetu Emissee (Master of Breath), who dwelt in an upper realm in which the sky was the floor, and who had the power to give and to take away the breath of life.

A.      in which the sky was the floor, and who had the power to give and to take

B.       where the sky was the floor, having the power to give and to take

C.      whose floor was the sky, and who has the power of giving and of taking

D.      in which the sky was the floor, with the power of giving and taking

E.       whose floor was the sky, having the power to give and take

答案A，为什么不是B  

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Q18: GWD-4-4

A new hair-growing drug is being sold for three times the price, per milligram, as the drug’s maker charges for another product with the same active ingredient.

A.      as

B.       than

C.      that

D.      of what

E.       at which
        

答案D，为什么不是A  

4-2意思理解了应该就蛮好解的

焦点在神话中的一个不知道什么人Esaugetu Emissee，总之要修饰这个神，who住在一个realm（好像是王国的意思吧）里,（in which/where都可以）那里天是地板，and who（与who dwelt平行）拥有生杀大权（能给与或拿走呼吸）

4-4 我也选错了，CDE 三个选项我不明白怎么分析，我当时选了E，但是AB肯定是不对的

XX times as 形容词 as... 或者 XX time the 名词... 没有than或者一个as的用法

字典上的例句：Yours is ten times the size of mine / Yours is ten times as large as mine.

CDE 怎么分析？是因为of 是固定用法才选what的吗？what这里=什么？请NN们指点啊。