晓燕在学校春季运动会百米赛跑中以16s的成绩获得冠军,测得她在50m处的速度是6m/s,到终点时的速度为7.5m/s,则全程内的平均速度是( )
( ) (7) Can I _____ you ? A. helpB.helping C .to help
( ) (6)_____ old is he ? A. HowB. WhatC. Where
( ) (5) Do you like ______ ? A. singB. singsC. singing
( ) (4) Where ____ you come from ? A. areB. isC. Do
( ) (3)--- ____kind of cake would you like ,Lily?--- I’d like a chocolate cake. A. WhatB. HowC. Where