Cho tổng P với đa thức $ -{{x}^{2}}{{y}^{5}}+3{{y}^{3}}-3{{x}^{3}}+{{x}^{3}}y+2 $ là một đa thức 0. Đa thức P là
A.$ P={{x}^{2}}y+3{{y}^{3}}+3{{x}^{3}}-{{x}^{3}}y-2 $.
B.$ P={{x}^{2}}y-3{{y}^{3}}+3{{x}^{3}}-{{x}^{3}}y-2 $.
C.$ P={{x}^{2}}y-3{{y}^{3}}+3{{x}^{3}}+{{x}^{3}}y-2 $.
D.$ P={{x}^{2}}y-3{{y}^{3}}-3{{x}^{3}}-{{x}^{3}}y-2 $.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The editor of the school newsletter asked me _____ a letter giving some practical advice
A.to write
B.for writing
C.writing
D.write

Cho hai đa thức: $ M=3,5{{x}^{2}}y-2x{{y}^{2}}+1,5{{x}^{2}}y+2xy+3x{{y}^{2}} $
$ N=2{{x}^{2}}y+3,2xy+x{{y}^{2}}-4x{{y}^{2}}-1,2xy $
Thu gọn đa thức $ M+N $ ta được
A. $ 7{{x}^{2}}y-2x{{y}^{2}}-4xy $ .
B. $ -3{{x}^{2}}y-x{{y}^{2}}-3xy $ .
C. $ 7{{x}^{2}}y-2x{{y}^{2}}+4xy $ .
D. $ 7{{x}^{2}}y-x{{y}^{2}}-4xy $ .

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Nam is really interested ………. environmental impacts.
A.in
B.of
C.at
D.on

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Air pollution, the greenhouse effect and global warming have a negative impact ………. the environment.
A.of
B.on
C.from
D.in

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
We should ………. our Earth from many threats such as deforestation, pollution and fossil fuel depletion.
A.protector
B.protection
C.protective
D.protect

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
He _____ that we could buy reusable bags and leave them in our car for shopping.
A.said us
B.said
C.says to us
D.told to us

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Thomas ……….about environmental pollution for his school newsletter at the moment.
A.will write
B.has written
C.writes
D.is writing

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The rhino habitat has been perfectly ………. in the region.
A.preserving
B.preserve
C.preserved
D.preservation

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Water pollutants are things such as detergents, pesticides and rubbish blockages in river that make the water unclean and ……….
A.contaminated
B.contamination
C.contaminate
D.contaminating