房屋建筑工程保修期从（）之日起算。

A.项目竣工

B.住宅交付使用

C.工程竣工验收合格

D.购房人取得房地产权证书

You'd better take something to read when you go to see the doctor________you have to wait. [      ]

A. even if  

B. as if

C. in case  

D. in order that