What ________ it is to jump into the river in summer to have a swim!
What ________ it is to jump into the river in summer to have a swim!
A.fun
B.a fun
C.a funny thing
D.a fun thing
答案及解析： A
解析：
在夏天跳到河里去游泳是件多么有趣的事情啊！fun 作为名词时是不可数名词
What ________ it is to jump into the river in summer to have a swim!
A.fun
B.a fun
C.a funny thing
D.a fun thing
答案及解析： A
解析：
在夏天跳到河里去游泳是件多么有趣的事情啊！fun 作为名词时是不可数名词