.
Miss Li ________ as a biology teacher for fifteen years in our school, and now she is Party secretary of our city.
| A．works | B．worked | C．had worked | D．has worked |
There was ______ time ______ I hated to go to school.
| A．a; that | B．a; when | C．the; that | D．the; when |
It is ______ world of wonders, ______ world where anything can happen.
| A．a; the | B．a; a | C．the; a | D．不填; 不填 |
While he was investigating ways to improve the telescope, Newton made ______ discovery which completely changed ______ man’s understanding of colour.
| A．a; 不填 | B．a; the | C．不填; the | D．the; a |
The most important thing about cotton in history is ______part that it played in ______ Industrial Revolution.
| A．不填；不填 | B．the; 不填 | C．the; the | D．a; the |
An accident happened at ____ crossroads a few metres away from ____ bank.
| A．a; a | B．不填；a | C．不填；the | D．the; 不填 |