Choose the word whose underlined part differs from the other three in pronunciation
A.walked
B.stopped
C.tried
D.talked

Choose the word whose underlined part differs from the other three in pronunciation
A.away
B.pearl
C.occur
D.among

Choose the word whose underlined part differs from the other three in pronunciation
A.cheated
B.talked
C.twisted
D.hurted

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
In the past, robots had a minor_____. They could do very simple things.
A.work
B.place
C.thing
D.role

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
In the future, robots will ________ an important role. They will do many things like humans.
A.take
B.do
C.play
D.make

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It’s his turn to _______the laundry today.
A.do
B.make
C.take
D.get

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
_________ robots can teach students in class.
A.Worker
B.Teaching
C.Doctor
D.Home

Xét các axit có tên gọi sau :
I. Axit 3 – clo propionic
II. Axit – 2 – clo propionic
III. Axit – 2 – metyl propionic
IV. Axit propionic
V. Axit sunfuric
Thứ tự tính axit tăng dần là
A.I < II < III < IV < V
B.III < IV < V < I < II
C.II < III < IV < V < I
D.III < IV < I < II < V

Dãy nào dưới đây đều tan vô hạn trong nước ở điều kiện thường ?
A. $ C{ H _ 3 }OH,\,{ C _ 2 }{ H _ 5 }\text{COOH,}\, C {{ H }_ 3 }CHO,\,\,{ C _ 6 }{ H _ 5 }OH $
B. $ C{ H _ 3 }O{ C _ 6 }{ H _ 5 },\,{ C _ 6 }{{ H }_ 5 }\text{COOH,}\, C {{ H }_ 3 }CHO,\,\,{ C _ 2 }{ H _ 4 }{{(OH)}_ 2 } $
C. $ C{ H _ 3 }OH,\,{ C _ 6 }{{ H }_ 5 }\text{COOH,}\, C {{ H }_ 3 }CHO,\,\,{ C _ 2 }{ H _ 4 }{{(OH)}_ 2 } $
D. $ C{ H _ 3 }OH,\,{ C _ 2 }{ H _ 5 }\text{COOH,}\, C {{ H }_ 3 }CHO,\,\,{ C _ 2 }{ H _ 4 }{{(OH)}_ 2 } $

Chất tạo được kết tủa đỏ gạch khi đun nóng với $ Cu{{\left( OH \right)}_ 2 }/O{ H ^ - } $ là
A. $ HCHO, $ $ HOC{ H _ 2 }CHO, $ $ HCOOH $
B. $ HCOOH $
C. $ HOC{ H _ 2 }CHO $
D. $ HCHO. $