Most computer users think it necessary for their software ________ regularly．
| A．to up date | B．to be updated |
| C．to have been up dated | D．to have updated |
Was it from Mary, _______ was working at a department store, ______ you learned the news?
| A．who; who | B．that; which | C．who; that | D．who; which |
The white-flag dolphin, ______ rare Chinese mammal, is in ___ dangerous state of dying out.
| A．the; / | B．the ; the | C．a ; a | D．a ; / |
It is believed that the prices of houses will be decreased by ______ 5%.
| A．any other | B．the other | C．another | D．other |
I enjoy my job in research because I have to______all the latest developments.
| A．keep in touch with | B．keep pace with |
| C．keep away from | D．keep down with |
--- Have you gone over what the teacher taught in class?
--- Not yet.
--- Better remember: ________.
| A．Don’t count your chickens before they’re hatched |
| B．A bird in hand is worth two in the bush |
| C．Strike while the iron is hot |
| D．All roads lead to Rome |