It's impolite to ________your teachers' office without knocking at the door.( )
A. |
describe |
B. |
check |
C. |
choose |
D. |
enter |
It's impolite to ________your teachers' office without knocking at the door.( )
A. |
describe |
B. |
check |
C. |
choose |
D. |
enter |