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 |
Whenever he was asked why he was late for class, he would answer carelessly, always the same thing.
A.saying |
B.said |
C.to say |
D.having said |
The old clock needs every day, otherwise it will stop working.
A.to turn up |
B.to wind up |
C.winding up |
D.wind down |
—I feel so nervous about the coming college entrance examination.
—________. You have been studying very hard.
A.It’s up to you | B.Take it easy |
C.You got it | D.I couldn’t agree more |
Our teacher requested all of us _________ late for class.
A.were not | B.could not be |
C.might not be | D.not be |
We ____________ here on time. But the traffic was so heavy.
A.can have come | B.must have come |
C.should have come | D.need have come |