shorter than
earlierbob is the earliest in our classbob is [earlier]than[][ ]student in our class 改错he runs more quicker than his neighbor .the yangtze is one of the longest river in the world. exercise much and smoke litter ,you will be more healthy.anyother意为其他的意思改错：1.morequicker改为 quicker2.river改为rivers3.没看懂题，