Section Three    Development(满分10分)

　　1.Each of the four symbols stand for a different number. In order to reach the correct total at the of every row, what is the value of each symbol?

　　2.Make a correct phrase according to the first letters of the words.

　　1)30=D____ of A____

　　2)4=S_____ in a Y____

　　e.g:60=M_____ in an H_______

　　Key:60=Minute in an Hour

　　(    )3.In a bicycle race from school to the park and back, Jack goes at 30 miles per hour to the park and 10 miles per hour back to school. Billy goes at 20 miles per hour in both directions. Who will finish first?

　　A. Jack will finish first.

　　B. Billy will finish first.

　　C. They will finish at the same time.

　　(    )4.Jane's birthday is in summer, but she was born in winter, because__________.

　　A. she was born in Australia and lives in China

　　B. she was born in China and lives in Canada

　　C. she is always moving to new places