It remains __________ whether the medicine will work on the human body.
| A．seen |
| B．to seen |
| C．seeing |
| D．to be seen |
There is no __________ swimming-pool in this school and the students often go to swim __________.
| A．indoors; outdoors | B．indoor; outdoor |
| C．indoor; outdoors | D．indoor; indoors |
My English teacher is really __________. She is often seen working in her office far into the night.
| A．warm-hearted | B．easy-going |
| C．hard-working | D．self-confident |
__________ Hu Jin would not appear that night, Lifang was __________.
| A．Found; heart-broken | B．Finding; heart-broken |
| C．To find; broke heart | D．Find; breaking |
It took us quite a long time to get to the amusement park. It was __________ journey.
| A．three hour | B．a three-hours |
| C．a three-hour | D．three hours |
Every morning Mr. Smith takes a __________ to his office.
| A．20 minutes' walk | B．20 minute's walk |
| C．20-minutes walk | D．20-minute's walk |