--The river used to be clean. How does it become dirty?
-- There are many factories ________ waste water into it.
A. pouring B. pour C. poured
Good learners often _______ what they need to learn _______ something interesting.
| A．learn; from | B．turn; in |
| C．connect; with | D．changes; into |
Each different ________of China _______ its own special forms of traditional art.
| A．parts; have | B．part; has |
| C．parts; has | D．part; have |
The teacher advised the parents to talk with their son _______.
| A．by himself | B．by herself |
| C．in person | D．by themself |
Beijing is famous _______ the capital city and it is also famous ______ the Palace Museum.
| A．for; as | B．as; for |
| C．to; for | D．to; as |
The child without parents ________ good care of by his teachers in this special school.
| A．is taken | B．are taken |
| C．take | D．takes |