7．Li Lei began to study in a middle school when he was years old．
A.11
B.13
C.15
17．Li Lei has to get up early because he has to _______ every morning．
A．catch the early bus
B．be the first to get to school
C．run to school
18．Li Lei's family spends much money_______．
A．on his mother's medicine
B．on his school things
C．on a new bike
19．Li Lei ran________ in the boys'1500 meters in his school．
A．fast
B．faster
C．fastest
20．________ makes Li Lei become stronger and stronger．
A．Growing up
B．Keeping running to school
C．His father's care．
