the question is so difficult that only ____students can work out it 选few 还是a few

问题描述:

the question is so difficult that only ____students can work out it 选few 还是a few
老师不是说so...that句型中后表否定吗,那应该用few

a few 有几个
翻译:这个问题如此的难,只有几个学生能算出来
而 few 几乎没有,不能和only搭配