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16.
His family is used to spend most of the time_in the open air.
A
C
17.
How much students are there in your class?
A
В
C
Ha Noi, that is the capital of our country, is a city of peace
18.
A
В
C
19.
The class was cancelled because of there weren't enough students
A
В
C
If it rains, we had to cancel the meeting scheduled for today
А
20.
В
C
21.
Nam isn't used to drive on the left.
A
C D