5、atherenjoytalkingtohisoldfriendsbyQQ?—No.healwaystalks______thephone.A.atB.inC.on()17.Paulcanplay______tennisbuthecan’tplay______drums.A.the;theB./;theC.the;/()18.One______boyhelpsmecrosstheriver.A.16-year-oldB.16-years-oldC.16yearsold()19.Thatbabykoalais______interesting.Ilikeitverymuch. A.