柳公权最初是得到哪位皇帝的赏识（）.

A、唐宪宗

B、唐穆宗

C、唐敬宗

D、唐文宗

Mum, I'm afraid it's going to rain.The clouds in the sky are ________.[     ]

A．building up  

B．breaking up

C．staying up  

D．getting up