两个-ing形式作主语谓,谓语动词该用单数还是复数?

问题描述:

两个-ing形式作主语谓,谓语动词该用单数还是复数?
能提供几两个-ing形式并列作主语的时候 谓语动词是单数的例子

赞同楼上的.看下面的例子:
1.单数:
Eating and dressing is a big question.
loving and being loved is the same concept.
Going or staying is up for you to decide.
2.复数:
Reading and writing are two problems.