Measures to stop housing prices from rising too fast but it remains to be seen whether th

问题补充：

Measures to stop housing prices from rising too fast, but it remains to be seen whether they still work.

A. are taking

B. had been taken

C. have taken

D. are being taken

答案：

A. are taking

B. had been taken

C. have taken

(答案→)D. are being taken

解析：考查名词。根据句意可知用现在进行时态，表示正在发生的事情，主语measures与动词take指为被动关系，故用现在进行时的被动语态。句意：正在采取措施来阻止房价上涨太快，但它们是否奏效还有待见证。故D正确。