Swan Lake is a famous ballet(芭蕾) in four acts, ________ on a German fairy tale.
| A．basing | B．based | C．bases | D．to base |
Cook was a strict but good captain, __________ usually took care of the sailors on his ship.
| A．the one who | B．one who |
| C．that | D．he who |
---How long do you think it will be __________ China sends a manned spaceship to the moon?
--- Perhaps two or three years.
| A．when | B．until |
| C．that | D．before |
You’d better take something to read when you go to see the doctor __________ you have to wait.
| A．even if | B．as if |
| C．in case | D．in order that |
Tom is one of the boys who __________ on time.
| A．is | B．are |
| C．am | D．was |
__________ they will not come to join us, we have to change our plan.
| A．Seeing that | B．When |
| C．For | D．As soon as |