Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Only two students from each class were __________ to join the competition.
A.selecting
B.opting
C.opted
D.selected

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My father thinks it is not good for pupils to get __________ in a romantic relationship early.
A.permitted
B.allowed
C.involved
D.helped

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Everyone has __________ that make them attractive to other people.
A.characters
B.selling points
C.qualities
D.views

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My grandmother doesn’t understand why boys and girls are __________ to be in the same school nowadays. She went to a single-sex school.
A.put
B.helped
C.allowed
D.called

Tổng số hạt p, e, n trong nguyên tử nguyên tố X là 52. Số khối của hạt nhân nguyên tử X là
A.35.
B.32
C.39.
D.36.

Nguyên tử kali có 19 electron và 20 nơtron, vậy số khối của hạt nhân nguyên tử kali là
A.31.
B.39.
C.34.
D.30.

Ion $ { X ^ - } $ có 10e, hạt nhân có 10n. Số khối của hạt nhân nguyên tử X là
A.18
B.19
C.21
D.20

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Planting trees and using propaganda can prevent ………. .
A.Forestation
B.Reforestation
C.Deforestation
D.Underforestation

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A good neighbor should show his ………. to those around him.
A.hope
B.will
C.generosity
D.consciousness

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It is advisable to go to blood _____ every few months. You never know when someone might have accidents that need blood.
A.givings
B.charities
C.celebrations
D.donations