21．I’d like to give my thanks to all of you on this special ______.
A．atmosphere B．tradition C．instruction D. occasion
22．The happy girl higher and higher while she sat on the swing, with her mother pushing her.
A．swung B．flied C．climbed D．jumped
23．This picture was taken a long time ago. I wonder if you can ____my brother.
A．find out B．pick out C．speak out D．look out
24．The old couple often take a walk after supper with their pet dog ____them.
A．following B． to follow C．followed D．being followed
