— English is very useful. — Yeah, in man
题型：选择题
问题：
— English is very useful.
— Yeah, in many countries in the world it ____ a foreign language.[ ]
A．uses as
B．is used as
C．is used for
D．is used by
题型：选择题
— English is very useful.
— Yeah, in many countries in the world it ____ a foreign language.[ ]
A．uses as
B．is used as
C．is used for
D．is used by
在X=0处（）。