Which of the following describes the function of the sentence “It is a nice day，isn’t it”？（）

单项选择题In the sentence “It’s no use crying over the spilt milk”，the italicized part is （）．

A.an object
B.an adverbial
C.a subject
D.a complement

单项选择题It is for bidden （）faster than 60 mph on this high way.

A.to driving
B.to drive
C.being driven
D.to be driven