— Frank, I’ve learned your plan. Could I make some suggestions?
— ________.
| A．Just for fun | B．Go ahead | C．With pleasure | D．Take it easy |
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 |
_______ email is becoming more popular with many people, I still like writing to my friends.
| A．When | B．As | C．Since | D．While |