---you can't imagine ___ fantastic fun web chatting is.---really?but it may cause a lot of troubleA.whatB.howC.whyD.when选什么?这个语法不懂诶,详细说明下,

---you can't imagine ___ fantastic fun web chatting is.---really?but it may cause a lot of trouble
A.what
B.how
C.why
D.when
选什么?这个语法不懂诶,详细说明下,

选A……别被上面的人误导……
因为fun是不可数名词,所以前面要用疑问代词what修饰……

B, how fun多有趣。how 表程度

B