Liên kết cộng hóa trị tồn tại nhờ:
A.các cặp electron dùng chung.
B.các electron hoá trị.
C.lực hút tĩnh điện.
D.các đám mây electron.

Find the word which has a different sound in the part underlined.
A.fields
B.newspapers
C.trees
D.plants

Find the word which has a different sound in the part underlined.
A.proof
B.blood
C.broom
D.troop

Find the word which has a different sound in the part underlined.
A.practice
B.cracker
C.bracelet
D.tractor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
War ………. can use our help.
A.unusables
B.invalids
C.cons
D.disadvantages

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The old man in the black suit goes down the street with a ……….. in his hand to help him walk.
A.wheelbarrow
B.chair
C.cane
D.wheelchair

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The ………. of the IPhone is that the software’s too rigid.
A.strength
B.drawback
C.pro
D.advantage

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The organization _____ to ensure women have access to education.
A.exists
B.existing
C.exist
D.is exist

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Yard ………. can give people stuff they need at a very low price.
A.gifts
B.donations
C.sales
D.transfusions

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My ………. on the gender issues is firm.
A.rallies
B.polls
C.data
D.stance