Sit down, Emma. You will only make yourself more tired，__________ on your feet.
| A．to keep |
| B．keeping |
| C．having kept |
| D．to have kept |
Happy birthday, Alice！So you have ________ twenty－one already!
| A．become | B．turned | C．grown | D．passed |
Some people eat with their eyes.They prefer to order what ________ nice.
| A．looks | B．smells | C．feels | D．tastes |
It was already past midnight and only three young men ________ in the tea house.
| A．left | B．remained | C．delayed | D．deserted |
On hearing the news of the accident in the coal mine，she ________ pale.
| A．got | B．changed | C．went | D．appeared |
The effect of the medicine on this kind of disease remains ________.
| A．seen | B．to be seen | C．seeing | D．to see |