Question

Some people are afraid of computers,____ in fact their whole purpose is to make life easier.

答案是 which 请高手指点。在此先谢谢
我在腾讯搜搜找到答案了 谢谢大家的帮助 。原题答案给错了，应该选when

when还有尽管， 虽然， 可以相当于even though; in spite of the fact that sth is true.
people have this fear of computers, when in fact their whole purpose is to make life easier.
They kept trying when they must have known it was hopeless.

Answer 1

when在这里的意思是就在那时，翻译：许多人很害怕电脑，但事实上在那时的整个目的是使生活变得更简单。

Answer 2

Some people are afraid of computers,__which__ in fact their whole purpose is to make life easier.
which 作为关系代词，代指前边的computers,
一些人害怕电脑，但事实上，电脑的全部目的（或全部宗旨）不过是让生活变得更容易一些。

Answer 3

原题答案没有错，你找到的是所谓的标准答案也没错，没语法错误，但是不同的语境有不同的答案，这就是英语，加油。

Answer 4

though, where, when都可以。
但是when不是很好，因为很容易误以为后面的their指代的是some people

which肯定是不对的，因为没有转折含义。