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 |
相关试题
---Has your father come back from Africa?
--- Yes, but he ______ here for only three days before his company 
sent him to Japan.
| A．was | B．has been | C．will be | D．would be |
---How did the plan strike you?
---Great, indeed!_______. I can not speak too highly of it.
| A．In fact | B．Be sure | C．After all | D．As a result |
1. official A. stone B. goldC. clothes D. position
2. minute A. bury B. busy C. lunch D. argue
3. noun A. country B. brou
ght C. southern D. mountain
4. stomach A. match B. machine C. Christmas D. chimney
5. existA. exercise B. exploration C. examine D. exp
ression
Every weekend, there is a meeting and our head teacher, with five of us, ____ it.
| A．attends | B．to attend | C．attend | D．attending |
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