建立从集合A={1,2,3,4}到集合B={5,6,7}的所有函数,从中随机的抽取一个函数,其值域是B的概率为( )
A:916
B:316
C:49
D:89
He __________ goes to Tai'an, so he wants to go there.
— What do you want to be in the future ,Nick?
—I want to be _____ pilot(飞行员) ,it is _____ exciting(令人激动的,兴奋的) job.