小强一庹的长度是147厘米，他围教室一周一共庹了21庹．请你估算一下，教室地面的周长大约是多少米？（一庹指人两臂左右平伸时，从一只手的中指端到另一只手的中指端的长度）

The UK ________ Great Britain and Northern Ireland, is a country famous _____ its history.

A．consisted of, for

B．consisting of, as

C．consisting of, for

D．consisted of, as