When I got back home I saw a message pinned to the door, ____ “Sorry to miss you; will call later.”
— What has Jack been doing recently? —I don’t know _____ care.
Such a custom came into _______ long ago.
His parents wouldn’t let him marry anyone ______ family was poor.
He attends the evening class ____, that is, Monday, Wednesday and Friday.
Many tall buildings _______ in Shanghai in the past few years.