Mr. Brown knows little Japanese，so he can't understand the ________ on the bottle of the pills.
| A．explanations | B．instructions |
| C．suggestions | D．introductions |
According to one theory, taking part in high-culture activities makes __________ easy for teenagers to make friends with powerful older people, __________ thus increases the chances of their lives turning out well.
| A．that, which | B．it, which |
| C．what, which | D．it, what |
There seems to be two causes as I try to figure out __________ that prevents so many children from being as happy as before.
| A．how it is | B．when it is |
| C．what it is | D．why it is |
We were struck by the limited use __________ their natural resources.
| A．those villagers made of |
| B．which those villagers made |
| C．for those villagers made of |
| D．for those villagers making of |
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 |