Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions
A professor of economy and history at our university developed a new theory of the relationship between historical events and financial crises.
A.economy
B.developed
C.between
D.financial crises

(28)
A.bring
B.lead
C.cause
D.produce

(30)
A.on
B.by
C.through
D.about

(31)
A.Additionally
B.However
C.While
D.Thought

The following are puzzle pieces that a plant needs to grow EXCEPT___.
A.carbon dioxide
B.water
C.light
D.roots

I put my keys on the table, but now they're gone. Someone............have taken them.
A.may
B.had to
C.should
D.would rather

What is this passage mostly about?
A.How plants grow
B.Sunlight and water
C.Energy sources
D.Nutrients in soil

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
If there are aliens out there, do you think they are much more ____ advanced than we are?
A.technological
B.technologically
C.technology
D.technologies

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
After the power failure last night, the washing machine started to ____, so I had to wash the clothes by hands.
A.make noise
B.malfunction
C.operate
D.work

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The telescope will photograph distant galaxies, ____ attempt to understand their past.
A.in
B.for
C.on
D.with