1.Although he is an eight-year-old boy,he can look after himself.或 He is an eight-year-old boy,but he can look after himself.2.He has less apples than Mary's brother's.3.He didn't go to school yesterday because of his illness.或He didn't go to school yesterday because he was ill.4.Tom doesn't sing so well as me.5.She plays the piano as well as her sister does.6.It's more sunny today than yesterday was.7.The book is the same as the one on the right.8.We are both Chinese.And we both love our motherland.9.She doesn't need to go to work by taix each day.10.Not every child likes eating sandwiches.11.Please don't worry.There's still little time left.