Long，long ago people made the first lightening(闪电).But they had to keep the fire burning，for they couldnt start it again if there was no lighting.Later，they found out hitting two pieces of stone together could make a spark(火花).The spark could fire dr

　　A.dont play B.didnt play C.not to play D.not play

　　A.but B.and C.so D.or

　　A.sad B.pleased C.angry D. sorry

　　A.dont lend B.not to lend C.didnt lend D.not lend

　　A.a few B.a little C. few D.little

　　A.too....to.... B.to； too C.so；that D.no；to

　　A.look at B.look for C.look after D.look up

　　A. Yes， thank you. B.No， thanks C.Thats all right D.Just fine.