While he was investigating ways to improve the telescope, Newton made __ discovery which completely changed __ man’s understanding of color.
| A．a, / | B．a, the | C．/, the | D．the, a |
相关试题
.I would have called you up for help had it been possible, but I _____ your phone number then.
| A．hadn’t had | B．didn’t have | C．shouldn’t have | D．couldn’t have |
On weekends when Jane comes back home from school, she eats everything in _____.
| A．scene | B．sight | C．view | D．range |
---Can I smoke here?
---No. On no condition _____ in the museum.
| A．is smoking permitted | B．smoking is permitted |
| C．was smoking permitted | D． smoking was permitted |
All his attention _____ on the computer game, he even didn’t notice his mother enter the room.
| A．has been fixed | B．was fixing | C．was fixed | D．fixed |
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