Not until he left his home ______ to know how important the family was for him.
| A．did he begin | B．had he began | C．he began | D．he had begun |
The Wilsons live in ______ A-shaped house near the coast. It is ______ 17th century cottage.
| A．the; 不填 | B．an; the | C．不填; the | D．an; a |
When you finish reading the book, you will have______ better understanding of ______ life.
| A．a; the | B．the; a | C．不填; the | D．a; 不填 |
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 |