6、immingalone.a.ifhedoesn’tcome b.ifhewon’tcome c.ifhewillcome ( )16.Theaccidenthappened_______acoldwintermorning.a.in b.on c.at ( )17.Don’ttakethedogtotheschool,theteacherswon’t___________.a.letinyou b.letyouin c.letyouout ( )18.what ____ you ______ at eight yesterday
7、evening? a. have, done b. did, do c. were, doing ( )19.Theteacheraskedme________Ineededanyhelp. a.whether b.that c.what ( )20.Everysummertheywenttotheseaside.therethey_____alotoftime______. a.take,toswim b.take,swimming c.spent,swimming