I.Choose the best answer.

1. It is easy _______ this exercise.

A. to do B. doing C. did D. does

2. We can make toys from __________.

A. cans B. old newspapers C. representative D. tourist

3. I promise I _________do my homework.

A. may B. will C. do D. certainly

4. The vase ______ yesterday is my father favorite one.

A. broke B. breaking C. break D. broken

5. A boy_________ over there is Ba.

A. walk B. walking C. walks D. walked

6. Hoa got used to………………in her new school after a month.

A. study B. studying C. studied D. is studying

7. eter’s not going to drive, ………………he? A. does B. is C. isn’t D. will

8. ………………the traffic was bad, they arrived on time.

A. Although B. In spite of C. Despite D. Even

9. If you want to get more………………, please contact Mrs. Hoa.

A. inform B. informer C. informative D. information

10. Last Tuesday, my daughter was absent from school………………of her illness.

A. because B. instead C. though D. but

11. The headmaster asked me………………for him outside his office.

A. wait B. waiting C. to wait D. waited

12. He says he’s been to………………restaurant in town. A. many B. every C. all D. most

Câu 1: Cho biểu thức
A =\(\frac{4xy}{y^2-x^2}\): (\(\frac{1}{y^2-x^2}\)+\(\frac{1}{y^2+2xy+x^2}\))
a) Tìm điều kiện của x, y để giá trị A được xác định
b) Rút gọn A

B = (\(\frac{1-x^3}{1-x}\)- x) : \(\frac{1-x^2}{1-x-x^2+x^3}\)với x khác -1 và 1
a) Rút gọn biểu thức A
b) Tính giá trị của biểu thức A tại x = \(-1\frac{2}{3}\)
c) Tìm giá trị cảu x để A = 0

Thực hiện các phép chia:
a)\(\frac{7x+2}{3xy^2}\):\(\frac{14x+4}{x^2y}\)
b)\(\frac{8xy}{3x-1}\):\(\frac{12xy^3}{5-15x}\)
c)\(\frac{3x^3+3}{x-1}\):(x² - x + 1)
d)\(\frac{4\left(x+3\right)}{3x^2-x}\):\(\frac{x^2+3x}{1-3x}\)
e)\(\frac{4x+6y}{x-1}\):\(\frac{4x^2+12xy+9y^2}{1-x^3}\)