While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man’s understanding of color.
| A．a; 不填 | B．a; the | C．不填; the | D．the; a |
You can certainly leave the classroom as soon as your homework__________.
| A．has done |
| B．has been done |
| C．will be done |
| D．will have been done |
Please don’t phone him between 1 and 3 p.m. tomorrow. He ______ a lecture then.
| A．will have delivered | B．has been delivering |
| C．will be delivering | D．delivers |
Five players ________a basketball team.
| A．made up of | B．making up of | C．consists of | D．are consisted of |
—Each boy and each girltalking about optional courses（选修课）.
—Yes! And they eachtheir favorite one!
| A．is; has | B．are; have | C．is; have | D．are; has |
In front of our house ________ we used to swim.
| A．a river lies that | B．does a river lie where |
| C．lies a river which | D．lies a river where |