Either the boy or his sister must have dinner here.
| A．his | B．her | C．their | D．theirs |
He has worked __________ the maths problem for nearly an hour but he simply can't work it __________.
| A．on；at |
| B．on；out |
| C．at；up |
| D．for；out |
The energy Jenny Bowen has devoted in the past ten years __________ the orphans has been considered __________ of great help.
| A．to help ； being |
| B．to helping；to be |
| C．to help ； to be |
| D．helping; being |
The __________ on his face told me that he was angry.
| A．impression |
| B．sight |
| C．appearance |
| D．expression |
Lucy asked for a separate room so that she could avoid __________ with Tom alone.
| A．to leave |
| B．to be left |
| C．being left |
| D．leaving |
—What do you think made Mary so upset?
—__________ her new bicycle.
| A．As she lost |
| B．Lost |
| C．Losing |
| D．Because of losing |