在多年冻土地区修建路堤时，下列不符合保护多年冻土的原则的是( )。

A．堤底采用较大石块填筑

B．加强地面排水

C．设置保温护道

D．保护两侧植被

his play,       , is very wonderful: there are many interesting characters in it.

A．out of the question

B．on the whole

C．in doubt

D．under no condition