4、B.issingingC.singing17.(3分)Let'sgotoplay________football.( )A.aB.theC./18.(3分)Igoto________schoolat7:30.( )A.aB./C.the19.(3分)Idon'thave________booksinmyroom.( )A.muchB.someC.any20.(3分)It'swarm________winterinourhometown.( )A.inB.atC.on五.填空21.(3分)(1)J n r (2)F br ry