House prices keep rising these days. A flat in our city costs now as in 1990.A. as three

问题补充：

House prices keep rising these days. A flat in our city costs now as in 1990.

A. as three times much

B. as much three times

C. much as three times

D. three times as much

答案：

A. as three times much

B. as much three times

C. much as three times

(答案→)D. three times as much

解析：倍数表达句型。倍数+ as + adj. +as …。房价这些天一直上涨，在我们这座城市买一套房的花费现在是1990年的三倍。