He had little idea that it was getting so late, ___________ ?
| A．didn't he | B．wasn't it | C．did he | D．was it |
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 |
— John, there is ______ Mr Wilson on the phone for you.
— I’m in ______ bath.
| A．a; the | B．the; a | C．a; 不填 | D．the; 不填 |
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 |
—Where is my blue shirt?
— It’s in the washing machine. You have to wear ____ different one.
| A．any | B．the | C．a | D．other |