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1 Ba doesn't get up at six o'clock every morning.
2 How many classrooms are there in his school?
3 How do you spell this word, Minh?
4 Stand up and open your book.
5 I am twenty-one years old and i'm a student
7 Is your house opposite the stadium?
8 There is a museum to the right of the house
9 In the neighborhood, there is a hospital and a factory.
10 Our class is on the third floor.
11 Nhung's house has six rooms
12 What time does your brother get up ?
Còn câu 6 mình thấy đúng mà!
đề đúng mà bạn. \(n^2+3=n^2+n-n-1+4=\left(n^2+n\right)-\left(n+1\right)+4\)
\(=n\left(n+1\right)-\left(n+1\right)+4=\left(n+1\right).\left(n-1\right)+4\)
ta thấy \(\left(n+1\right).\left(n-1\right)\)chia hết cho n+1. vậy để \(n^2+n\)chia hết cho n+1 thì 4 chia hết cho n+1. hay n+1 thuộc Ước của 4. vậy n= 0; -2; 1; -3; 3; -5
1.B( does)
2.C(floors)
3.
4.B(chairs)
5.A(Tom’s)
6.B(seventh)
7.A(does)
8.B(students)
1: B=>does
2:C=>floors
3:C=>an
4:B=>chairs
5:A=>Tom's
6:B=>seventh
7:A=>is
8:B=>students
1.isn'n -> didn't
2.there are -> are there
3.are -> do
4.you -> your
5.year -> years
1.isn'n sang doesn't
2.there are sang are there
3.are sang do
4.open sang read
5.year sang years