( )Mary's school trip is May 5th. ( )Mary is very happy. ( )Mary is 14 years old. ( )We buy some apples and hamburgers. ( )They buy a new white hat for 4 yuan, and pants for 70 yuan.
A. You need to work hard and never give up. B. You have to think carefully. C. You will make your invention work. D. You have to make a good plan and make sure that there is need for your invention. E. You must study hard. 1._____ 2._____ 3._____ 4._____ 5._____