it is a great fun to do sth.还是it is great fun to do sth
问题描述：
it is a great fun to do sth.
还是it is great fun to do sth
答
是it is great fun to do sth
答
不加冠词，因为fun是不可数名词.
答
当然是it is great fun to do sth啦,fun是个不可数名词哦~