求助less fewer用法

Q4:

Only seven people this century have been killed by the great white shark, the man-eater of the movies—less than those killed by bee stings.

1. movies—less than those
2. movies—fewer than have been
3. movies, which is less than those
4. movies, a number lower than the people
5. movies, fewer than the ones

发现有的可数名词在比较时也有用less的

NN能不能详细解释一下这俩词的用法..急!!!!

答案是A 吗？

觉得其他几个有比较明显的错误。我也发现GWD, Prep和OG上面有多个less/fewer问题，答案不是特别有规律，请教NN。谢谢！

同问.怎么分.

好像只有人用FEWER,其他都用LESS?

这题是不是该选B?

fewer(people) than have been killed.

坚持可数名词后面肯定用FEWER!

正确答案是E?

虽然修饰人要用FEW不能用LESS,但是E选项的the ones指代people?

对于ones的指代不是很清楚，总觉得不对，请高人赐教：） 感谢。

我选E,用的排除法.

A B没有表达句意,分号是附加部分，首先排除。

C which可跳跃修饰，所以这里它修饰的东西不清楚，也是正确性错误

D a number　不能用高低修饰，还是正确性错误。