________ their time, many airlines now allow passengers to print their boarding passes online.
A.Save B.To save C.Saving D.Saves
（2016贵州六盘水中考）My father used to drive to work, but he is used to ______ now.
A.walking B.walked C.walks D.walk
My friend invited me ______ the art club , and I accepted it with pleasure.
A.join B.to join C.joined D.joining
Parents should tell their children ________unhealthy food. It's bad for their health.
A.not to eat B.not eating C.to eat D.eating
Meri Snow Mountain is not far away from here, but it will still take us a few hours ________ there by bike.
A.getting B.to get C.got D.get
The workers are busy ________ windows to the new buildings these days.
A.to fix B.fixing C.fixed D.fix
