Lily practiced _____the piano over and over every day to pass the piano examination next month.
A.playing B.play C.to play D.played
I wanted to read in the library, but the door ________ closed.
A.kept B.is still C.remained D.was remained
Mr Shen is an old man who enjoys ________ stamps all over the world.
A.collects B.collecting C.to collect D.to collecting
Teachers often warn us ________ tricks on others.
A.to play B.play C.not to play D.not play
The boy found all the teachers and students in the school looked very ________.
A.friendly B.politely C.happily D.gently
As a policeman in the town, my father's job is to protect people ________ danger.
A.in B.from C.at D.with
