their work 这里的work表示的是单数还是复数?

their work 这里的work表示的是单数还是复数? about their study and about their work.这里为什么about要出现两次,后面的about可以去掉吗 work on their work their guts work,work的用法 英语翻译这里的opening up,at work Many owners of private cars are going to offer free rides to people on their way to work.我想问一下这里的‘on their way to work’修饰的是owners of private cars还是people? on their way to work work work work work work work work work work work