谓语动词,应该用is ,还是are

问题描述:

谓语动词,应该用is ,还是are
1 weakness 当缺点来讲可以用复数吧.下面 那个句子才是正确的写法?
A What are your strengths and weaknesses ,
B What are your strength and weakness
两种写法是不是 都对呢?
看到网上也有这么写的:
C What is your strength and weakness?
我觉得既然是并列的两个主语,谓语动词,这里用 is 是不对的?应该 are 才行吧.
2 你最大的优点 和 最大的缺点是什么?
( 英语翻译,

What are your strengths and weaknesses ?
谓语动词用are ,因为【strength and weakness 是“可数名词”】.
又如:
Tolerance is one of her many strengths.
What are his weaknesses?BWhat are your strength and weakness ?这个您觉得如何啊。并列的两个主语,谢谢