Clara leaves the office after finishing all her works.

1. It was interesting. I had a lot of fun

2. What do you think about the place?

3. My friends took me to a temple.

4. I bought gifts for my friends.

5. Were you tired of the trip?

6. She put the hat on the wall.

1. Lan promises to............... her best in learning English.

a) try b) make c) work d)learn

2. Learners don't only learn the meaning............... the spelling and pronunciation of new words.

a)too b)as well as c)also d) but also

3. The manager asked me.................. for him outside his office.

a)wait b) waiting c) to wait d)waited

4. She hasn't written to me...............

a)already _{b) yet} c) never d) any longer

5. Would you be................. to hold the door open?

a) kind enough b)too kind c)as kind d) so kind

2. out? / do/ want/ you/ when/ what/ you/ to/ say/ go/

-> What do you want to say when you go out?

3. often/ brother/ his/ listens/ in/ to/ time./ my/music/ free

-> My borther often listens to music in his free time.

4. I/ to/ to/ every/ city/ buy/ go/ books/ Sunday morning./ the

-> I go to the city to buy books every Sunday morning.

5. good / the / there./ let’s / and / time / mountain / go / have / to / a /

-> Let's go to the mountain and have a good time there.

VIII. Complete the second sentence, using the word given in brackets so that it has a similar

1. What about singing and dancing? -> Why don’t we sing and dance?

2. Noone in our school is stronger than me.-> I am the strongest in my school.

3. What’s your brother’s height?-> How tall is your brother??

4. His teacher always drives to work.-> His teacher always goes to work by car.

5. Peter is 1.80 meters tall. Linda is 1.70 meters tall-> Linda is shorter than Peter.

IX. Write a composition (about 80 words) to tell about your school:

X. Using the cues to complete the sentences.

1. Lan/ Ly/ go/ bookstore/ buy/ books/ now

=> Lan and Ly go to the bookstore to buy books now.

2.I/ not like/ winter/ because/ it/ very cold.

=>I don't like winter because it's very cold.

3. Many / plants/ animals/ danger/ because /we /destroying /them.

=> Many plants and animals are in danger because we are destroying them.

4. There/ peas/ but / not/ potatoes.

=> There are not only peas but also potatoes.

5.She/ like /dozen/ eggs/ vegetables.

=> She likes dozen of eggs and (some) vegetables.

Nguyễn Hoàng ViệtAkai Haruma

a/ Gọi x,y là độ dài cạnh của hình chữ nhật (x > y > 0)

Theo đề : \(\left\{\begin{matrix}x+y=7\\xy=16\end{matrix}\right.\) => x,y là nghiệm của PT \(t^2-7t+16=0\)

PT này vô nghiệm. Vậy không tồn tại hình chữ nhật trên.

b/ Tương tự :

\(\left\{\begin{matrix}x=4y\\xy=12\end{matrix}\right.\) \(\Leftrightarrow\left\{\begin{matrix}x=4\sqrt{3}\\y=\sqrt{3}\end{matrix}\right.\)

Vậy ...................................

\(\frac{x-1}{13}+\frac{x-3}{11}+\frac{x+1}{15}=\frac{x+37}{17}\)

\(\Rightarrow x\left(\frac{1}{13}+\frac{1}{11}+\frac{1}{15}-\frac{1}{17}\right)=\frac{37}{17}+\frac{1}{13}+\frac{3}{11}-\frac{1}{15}\)

\(\Rightarrow x=\frac{\frac{37}{17}+\frac{1}{13}+\frac{3}{11}-\frac{1}{15}}{\frac{1}{13}+\frac{1}{11}+\frac{1}{15}-\frac{1}{17}}\)

=> x = 14

Đơn giản thôi mà Đạt :)

Đặt \(t=\sqrt{3-x},t\ge0\) thì \(x=3-t^2\) thay vào P :

\(P=t+3-t^2=-\left(t-\frac{1}{2}\right)^2+\frac{13}{4}\le\frac{13}{4}\)

Tới đây tìm được GTLN.

Không tồn tại GTNN nhé :)