Theo thuyết A-rê-ni-ut thì chất nào sau đây là muối trung hòa?
A. $ N{ a _ 2 }HP{ O _ 4 } $
B. $ {{\left( N{ H _ 4 } \right)}_ 2 }S{ O _ 4 } $
C. $ NaHC{ O _ 3 } $
D. $ NaHS{ O _ 4 } $

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question.
In the United States ________ the states but Hawaii is an island.
A.neither of
B.all of
C.none of
D.no of

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Jane only makes cakes with the ________ butter.
A.best unsalted Danish
B.best Danish unsalted
C.unsalted best Danish
D.Danish best unsalted

Dãy nào sau đây gồm các hiđroxit lưỡng tính?
A.$ Fe{{\left( OH \right)}_ 3 },Mg{{\left( OH \right)}_ 2 },Zn{{\left( OH \right)}_ 2 } $.
B.$ Ca{{\left( OH \right)}_ 2 },Pb{{\left( OH \right)}_ 2 },Zn{{\left( OH \right)}_ 2 } $.
C.$ Ba{{\left( OH \right)}_ 2 },Al{{\left( OH \right)}_ 3 },Sn{{\left( OH \right)}_ 2 } $.
D.$ Zn{{\left( OH \right)}_ 2 },Al{{\left( OH \right)}_ 3 },Sn{{\left( OH \right)}_ 2 } $.

Theo A-rê-ni-ut, hiđroxit nào sau đây có tính lưỡng tính ?
A.$ Pb{{\left( OH \right)}_ 2 } $ 
B.$ Zn{{\left( OH \right)}_ 2 } $ 
C.$ Al{{\left( OH \right)}_ 3 } $ 
D.Tất cả

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I took __________ to this town.
A.a boring long train journey
B.a train journey boring long
C.a train journey long boring
D.a long boring train journey

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Helen has just bought __________.
A.two scarves new wool black
B.two new black wool scarves
C.some new black wool two scarves
D.two black wool new scarves

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Paul has just sold his_____ car and intends to buy a new one.
A.black old Japanese
B.Japanese old black
C.old Japanese black
D.old black Japanese

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I love that _______ antique car that always parked at the end of the street.
A.really big old green
B.big really old green
C.really big green old
D.really old big green

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Ann has a ________ face.
A.round pink small
B.small round pink
C.small pink round
D.round small pink