Students should have access to good resources, which ______ beneficial to their study.

A. are        B. is

有的人认为要用单数，which 指前面的 have access to good resources；有人认为要用复数，which指good resources。您怎么看？求分析！谢谢！

(补充回答：如果选A,关系代词代替先行词为good resources，作主语谓语用复数are,如果选B,关系代词代替先行词为前面整句话内容，作主语谓语用单数is,从出提者命题思路来看，应该是考察关系代词代替整句话的内容，因此选B，否则这个命题都有问题了，属于多选题了。）

回答如下：

答案为B为正确答案，引导非限制性定语从句的关系代词which指代前面整句话的内容，即先行词为前面整句话的内容，作定与从句的主语时，其谓语用单数。

补充2个非常重要且非常实用的短语

(1)have access to sth: 

可以到达； 可以使用；有接触…的机会或权利

Students must have access to good books.
学生必须有机会读到好书。

I have access to his office.
我可以进出他的办公室。

Students at the Belfast campus have access to excellent sports facilities.  

在贝尔法斯特校园的学生可以使用极好的体育设施.

Only 40 % of 5 - year - olds have access to preschool education.  

5 岁 孩童中只有40%能享受学前教育.

They don't have access to a convertible currency.  

他们无法得到可兑换货币.

They now have access to the mass markets of Japan and the UK.  

他们现在进入了日本和英国的大众市场。

Batch processing in which input - output units have access to a computer through a data link. 

一种批处理方法[技术],其中输入输出设备是通过数据链路去访问计算机的.

Do you have access to beautiful girls?  

你能接近漂亮的女孩 吗 ?

It's possible, but you'd have to have access to some serious chemistry.  

这是可能的, 但你就得好好研究下化学.

After the case is adjudicated, you can have access to the autopsy reports.  

在案件判决之后, 你有权使用尸体解剖报告.

Pass this along to every woman you have access to.  

传送此信给每个在电脑名单中的女性.

If you have access to edit the webpage you only ask permission.  

如果你可以编辑网页,你只要获得允许.

percent of whites have access to the Internet from home.  

将近27%的白人在家中上网.

 You have access to reading the forums, except for private areas.  

用户可阅读除私密区之外的论坛.

You also have access to updated information in the queried records.  

还可访问查询记录中的更新信息.

People living here have access to that swimming pool free.  

住在这里的人可以免费去那个游泳池游泳.

 Your cat should always have access to fresh water.  

猫咪要喝新鲜的水.

(2)be beneficial to 对 ... 有益，有助于 .../有利于, 有益于

Sports are beneficial to building our bodies.

体育运动有益于增进我们的体质。

Fresh air will be beneficial to your health.
新鲜空气会对你的健康有所助益。

I hope your holiday will be beneficial to you.
我希望你的假期会对你有益。

It would be beneficial to use a separate pillow for your head.
这将有利于你头部枕单独使用。

These vitamins are beneficial to our health.
这些维他命对我们的健康有益。

I think joint venture will be beneficial to us both.
我认为合资经营对我们双方都有利。