Is this the reason ________ at the meeting for his carelessness in his work?
| A．explained | B．what he explained |
| C．how he explained | D．why he explained |
Many people enjoy the TV play very much, which ______ real life.
| A．based on | B．was based on | C．resulted in | D．was resulted in |
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 |