What are blue polyethylene bags used for?
A.to produce milk
B.to protect the environment
C.to prevent bruising, protect against the frost and speed ripening.
D.protect against the frost and speed ripening.

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
Poverty in the United States is noticeably different from that in other country.
A.from
B.noticeably
C.the
D.other country

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A conductor uses signals and gestures to let the musicians to know when to play various parts of composition.
A.the musicians
B.to play
C.uses
D.to know

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Higher education is very importance to national economies, and it is also a source of trained and educated personnel for the whole country.
A.educated
B.economies
C.importance
D.the whole country

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The students are going to hearing three short conversations about food.
A.hearing three short
B.going
C.The students
D.about food

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There are many single mothers and single fathers which are raising children by themselves.
A.are
B.many
C.which
D.themselves

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He used to smoking a cigar after meal but now he quit smoking because he has got some respiratory problem.
A.after
B.used to smoking
C.because
D.smoking

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She wishes that we didn’t send her the candy yesterday because she’s on a diet.
A.didn’t send
B.because
C.on
D.her the candy

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Several people have apparent tried to change the man’s mind, but he refuses to listen.
A.Several
B.apparent
C.mind
D.listen

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We were advised not drinking the water in the bottle.
A.in
B.the water
C.drinking
D.advised