Question 3. Use the correct tense or form of verb given in each sentence

1. We (not see) ........her since last Sunday

2. Long (buy)........... this car last week

3. My father (work)......... in this factory for ten years

4. this house (build)................... in 2000

Question 4. Choose the word or phrase(A,B,C or D) that best fits the blank space in each sentence

1. Lan and mai have been a pen pal................ two years

A. for B. since C. about D. on

cho Z = \(\left(\sqrt{x}-\dfrac{x+2}{\sqrt{x}+1}\right):\left(\dfrac{\sqrt{x}}{\sqrt{x}+1}+\dfrac{\sqrt{x}-4}{x-1}\right)\)

a. rút gọn

b. tìm x để Z < \(\dfrac{1}{2}\)

(giúp mk vs ạ, mk đang cn gấp)

Cho Y = \(\left(\sqrt{x}-3+\dfrac{1}{\sqrt{x}-1}\right):\left(\sqrt{x}-1+\dfrac{1}{1-\sqrt{x}}\right)\)

a. rút gọn

b. Tìm x để Y < \(\dfrac{1}{2}\)

( giúp mk vs ạ , mk đang cn gấp)

1. Cho X = \(\left(\dfrac{2}{1-\sqrt{x}}-\sqrt{x}\right):\left(\dfrac{1}{1+\sqrt{x}}+\dfrac{2\sqrt{x}}{1-x}\right)\)

a. rút gọn X

b. Tìm x để X = 4

2) Cho A =\(\dfrac{1}{\sqrt{x}+1}-\dfrac{2}{\sqrt{x}-1}+\dfrac{x+3}{x-1}\)

a. Rút gọn A

b. Tìm x để A < \(\dfrac{1}{2}\)

3) cho K = \(\left(\dfrac{\sqrt{x}+1}{x-1}-\dfrac{1}{\sqrt{x}+1}\right):\dfrac{x+2}{1-x}\)

a. Rút gọn K

b. Tìm GTNN của K

4) Cho B =\(\left(\dfrac{\sqrt{x}}{\sqrt{x}+1}-\dfrac{\sqrt{x}}{x-1}\right):\left(\dfrac{x+2}{x+\sqrt{x}}-\dfrac{2}{\sqrt{x}}\right)\)

a. Rút gọn B

b. Tìm x để B > \(\dfrac{1}{2}\)

(mk đang cn gấp ạ, lm đầy đủ các bc nhé!! thanks!!

1) Cho P =\(2\left(\dfrac{1}{\sqrt{x}-1}-\dfrac{1}{\sqrt{x}}\right):\dfrac{\sqrt{x}+1}{x^2-x}\)

a. Rút gọn P

b. Tìm x để P = \(\sqrt{2018}\)

( lm đầy đủ các bước nhé)