—Mom,________everything has been bought, shall we have a look around the zoo?
—No, we should hurry home.Your father will soon return for lunch.
A:for
B:now
C:because
D:with
如图中,图甲X表示人体某器官,①、②表示血管,箭头表示血流方向,图乙表示血管①、②中血液的气体含量,下列判断错误的是( )