Our chemistry teacher told us to do the experiment _____ (careful).
Tell me since when he ______ in your school.
A. taught
B. has taught
C. teaches
D. had taught
How much energy given off by the sun reaches the earth?
A.100 % but indirectly
B.5 %
C.0.5
D.only a very tiny amount
—Which subject do you like______?
—I like chemistry than any other one.
A. better, better
B. best, better
C. best, best
D. better, best
The nation is only interested in people______.
A. with diplomas
B. who specialize in physics and chemistry
C. who are valuable to the gross national product
D. both A and C
This passage centers mainly on ______ .
A.harnessing energy through chemistry
B.our last source of power
C.how water power is produced
D.the amount of solar energy that can be utilized
The passage tells us that proof of life on Mars would ______.
A.make clear the complex chemistry in the development of life
B.confirm the suggestion that bacterial fossils traveled to Earth on a meteor
C.reveal the kind of conditions under which life originates
D.provide an explanation why life is common in the universe
提示:原本擅长化学的Cathy考试时因粗心漏做一页试题。她正闷闷不乐时遇见了Mary。
(Mary = M ; Cathy = C )
M : Hi, Cathy, you don&39; t look happy. 51 ?
C : I didn&39; t do well in the chemistry test.
M : Really? I could hardly believe it. Everyone knows you are 52 .
C : But this time 53 .
M : What happened?
C : I missed 54 .
M : What a pity ! So 55 next time !
C : Yes, I will.
It is absolutely ______ that our class will win the game.
A.sure
B.exact
C.right
D.certain
As a matter of fact, our life-styles are changing _________and our bodies.
A. as such
B. so such
C. such as
D. so are
Our teacher had us ______ a report on our investigation of the case.
A.writing
B.to writing
C.to write
D.written