有人说14—17世纪是“人被发现”和“世界被发现”的时代。其中“世界被发现”是指( )
A:____
B:Good morning.
B:My name is Jack.
B:I'm twelve.
B:Table tennis.
B:OK.
A.How old are you?
B.Good morning.
C.Let's play it in the afternoon.
D.What's your name?
E.What's your favourite sport?