I want to know when he _______ for New York tomorrow.
| A．has left | B．is leaving | C．had left | D．has been leaving |
The room ___________ window is open is mine.
| A．which | B．its |
| C．that | D．whose |
Don’t turn on the radio __________ your mother allows you.
| A．unless | B．because |
| C．if | D．and |
He devotes ________to ________.
| A．himself; teaching | B．himself; teach |
| C．him; teaching | D．him; teach |
Only when it is hungry ______ a human being.
| A．a lion will attack | B．a lion should attack |
| C．will a lion attack | D．should a lion attack |
You’d better _______ your score and see if you have passed the exam.
| A．add up to | B．add to |
| C．add up | D．add |