30．The extra room________very useful when we had visitors．
| A．had been proved | B．was proved |
| C．had proved | D．Proved |
I believe the beauty of nature there will make an excellent ______ upon the tourists.
| A．guide | B．adjustment | C．impression | D．attraction |
I wonder why he didn’t do it as ______.
| A．told him | B．he told | C．telling to | D．told to |
After studying in America for seven years, Lily’s brother ______ his job as a doctor in Japan.
| A．took up | B．took over | C．took in | D．took on |
The water companies were instructed to keep the people ______ to the polluted water.
| A．from exposing | B．being exposed | C．exposing | D．from being exposed |
---No words are strong enough to express our thanks for your coming.
---_______.
| A．It’s a pity | B．I hope so | C．It’s my pleasure | D．With pleasure |