It's impolite to ________your teachers' office without knocking at the door.( )
describe
check
choose
enter
I didn't know anyone at the party, I felt a bit lonely.( )
A.orB.soC.andD.but
Thanks for helping , Mary. I have improved my English a lot.( )
A.meB.youC.himD.her
To our surprise, the computer won the chess game against the human player.( )
A.certainlyB.usuallyC.finallyD.mostly
In order to sell more products, we need to come up with more ideas.( )
A.trueB.commonC.simpleD.creative
This is a private letter Tom. Nobody else can open it.( )
A.forB.withC.fromD.about