three million tons of rubbish 谓语用单数还是复数

three million tons of rubbish 谓语用单数还是复数 thousands of tons of rubbish 作主语时谓语动词用单数还是复数 2800 tons of paper 作主语,谓语用单数还是复数 three parts of the article谓语用单数还是复数 three of us加谓语单数还是复数? three glasses of water谓语动词是单数还是复数? thousands of rubbish 后用单数还是复数 为什么 three quarters of the staff作主语,谓语动词用单数还是复数啊? what kind of后面的名词,用单数还是复数?谓语动词单数还是复数?举例 none of 后面谓语用单数还是复数啊? a set of keys 后用单数还是复数谓语 two piece of news ,谓语动词用复数还是单数?