II.

1. D -> tell

2. C -> was

III.

1. to keep - chatting

2. was invented

3. collecting

I.

1. walks

2. learn

3. goes

4. feel

5. study

6. have

7. does

8. likes

9. do you have

10. doesn't have

III.

1. flies

2. is making

3. reads

4. get - have

5. Why does it always rain...

6. understands

7. draws

8.  Why do you always criticize...

9. isn't raining

10. rises

II.

1. play

2. reads

3. have

4. does

5. go

6. are

7. has

8. watches

9. is

10. am - are

III.

1. are

2. Do

3. do

4. does

5. are

6. are

7. do

8. is

1, B

2, B

3, A

4, she also speaks

5, A

6, A

1. am driving

2. Are you doing

3. are coming

4. am not using

5. is giving

6. is meeting

7. is leaving

8. Is Dave’s father taking

9. aren't visiting

10. are having

1. We are going to the shopping mall on Saturday.

2. Can you lend me a dictionary, please?

3. Would you like to join us for dinner tonight?

4. I am spending a week at a summer camp.

5. My mother has long straight black hair.

6. I don't like Joana because she isn't friendly.

T nghĩ đề thiếu.

\(5x^2y-5xy^2-10x+10y\)

\(=\left(5x^2y-5xy^2\right)-\left(10x-10y\right)\)

\(=5xy\left(x-y\right)-10\left(x-y\right)\)

\(=5\left(x-y\right)\left(xy-2\right)\)

Sự lắng nghe, thấu hiểu, quan tâm, công bằng.

Gọi Oz là tia phân giác góc xOy

a, Vì OA = OB \(\Rightarrow\Delta OAB\) cân tại O

Mà Oz là tia phân giác góc xOy 

\(\Rightarrow\) OK là tia phân giác góc xOy 

Trong một tam giác cân, đường phân giác của góc ở đỉnh đồng thời là đường trung tuyến của tam giác đó.

\(\Rightarrow\) OK là đường trung tuyến của \(\Delta OAB\)

\(\Rightarrow KA=KB\)

b, 

Trong tam giác cân, đường phân giác ứng từ góc đỉnh sẽ vuông góc với cạnh đáy tương ứng.

\(\Rightarrow OK\perp AB\)

1. exciting- > excited

2. when -> since

3. now - > then

4. than he now -> than he does now

5. was sent -> which was sent