7^4 tận cùng là 1 =>17^4 tận cùng bằng 1 => 17^5 tận cùng bằng 7

C/m tương tự ta được 24^4 tận cùng bằng 6

                                  13^21 tận cùng bằng 3

Do đó 17^5 + 24^4 - 13^21 có tận cùng bằng:7+6-3 đông dư(kí hiệu ở dưới)0(mod 10)hay dề bài chia hết cho 10.

Vậy

1/ What is the weather like in your country?

2/It's often hot in the summer.

3/What do you do in the spring?

4/We play volleyball with friend.

5/What do you do when it's ?

6/We stay at home and listen to music.

7/Do you watch TV when it's warm?

8/When it's warm. we often go jogging.

Thế có mà chết!200 câu sao

BT1: 1/It's cold in winter.

2/When it's cold, I'm play soccer.

3/I'm go sailing in the summer.

4/When it's hot, he goes swimming.

5/She spend her summer vacation in the country.

BT2:1/What does your father do when it's cool?

My father rides his bike.

2/What does he do when it's hot?

He goes sailing.

3/What does your brother when it's cold?

My brother plays basketball.

4/What does she do when it's cold?

She watches television.

5/What does Lan do when it's warm?

She goes for a walk.

6/What does Ba do when it's hot?

He goes swimming.

Nhớ tick cho mk nha!

Từ nào có trọng âm khác

1/My house is in front of the past office.

2/The school is behind the museum.

3/Her office is oppisite the movie theater.

4/The bookstore is between the bakery and the toystore.

5/The police station is next to the drugstore.

What are you going to the movies?