问一道英语单项选择题

问题描述:

问一道英语单项选择题
It's( )fun to learn another foreign language.
A.so many
B.so much
C.such many
D.such much
请简要说明理由,

B.
fun不可数,所以要用much修饰,由于没有such much这一说,所以选B.