a tube of toothpaste 用单数还是复数提问

a tube of toothpaste 用单数还是复数提问 a tube of toothbrush 用单数还是复数提问? a tube of toothpaste用中文怎么说? a bar of soap 用单数还是复数提问? a set of keys 后用单数还是复数谓语 英语中a pair of 后用单数还是复数? A group of children 用单数还是复数? a score of eggs 谓语用单数还是复数 a pair of pants谓语动词用单数还是复数? a pair of sunglasses 后面用单数还是复数? a number of 前面的be用单数还是复数 a few of是单数还是复数