Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The archaeological excavations that led to the_______ of the ancient city lasted several years.
A.heritage
B.invention
C.discovery
D.dynasties

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The old houses have been pulled _______ in order to build a modern residential complex.
A.down
B.in
C.off
D.up

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
What will you do in Phong Nha – Ke Bang National Park if you have a _______ to visit it?
A.journey
B.choice
C.option
D.chance

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The visit to the museum would be _______ because we can get more information for our history assignment.
A.harmless
B.useless
C.useful
D.harmful

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
In addition to _______ the caves and grottos, and seeing its flora and fauna, visitors can also enjoy mountain climbing in the steep mountains.
A.exploring
B.having
C.purchasing
D.borrowing

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A lot of _______ from ancient times are on display at the national heritage museum.
A.complex
B.dynasty
C.intact
D.relics

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A lot of _______ houses in Hoi An remain intact even after several hundred years.
A.ancient
B.up to date
C.modern
D.state of the art

Nghiệm của đa thức $ f\left( x \right)=x\left( 1-2x \right)+\left( 2{{x}^{2}}-x+4 \right) $  là
A. $ x=1. $
B.Vô nghiệm.
C. $ x=0. $
D. $ x=-1. $

Số nghiệm của đa thức $ {{x}^{2}}+4x+4 $ là
A. $ 0 $ .
B. $ 2 $ .
C. $ 1 $ .
D. $ 3 $ .

Cho $ f\left( x \right)=9-{{x}^{5}}+4x-2{{x}^{3}}+{{x}^{2}}-7{{x}^{4}} $ ;
$ g\left( x \right)={{x}^{5}}-9+2{{x}^{2}}+7{{x}^{4}}+2{{x}^{3}}-3x $ .
Nghiệm của $ f\left( x \right)+g\left( x \right) $ là
A. $ 0;-3 $ .
B. $ 0\,;\,\,\dfrac{1}{3} $ .
C. $ 0\,\,;-\dfrac{1}{3} $ .
D. $ 0;\text{ }3 $ .