A. dioxide B. neighbourhood C. selfless D. ink A. tether B. impoverish C. ceremony D. hoverboard A. oppress B. record-holder C. statement D. revision A. riverbank B. theatre C. be proud of D. clean the window A. unsmiling B. manual C. conservation D. Macao A. happiness B. a little C. golden D. rust A. Lost and Found B. document C. respect D. milometer A. make progress B. morning exercises C. English book D. wade A. frequently B. all one's life C. May Day D. breed A. weave B. anchor C. reminder D. data