IV/ fill in the blank with an appropriate preposition

1. The Ao dai consists ......of.......a long silk tunic thatis slit on the sides and worn over loose pants

2. My sister was born........in.... 30th April 2006

3. We should travel......at....... 7 o'clock in the morning

4. Do you often spend your friends and relatives beautiful cards.......at...... Christmas

5. There are footnotes written....in........ The bottom of each page in this book

6. Try to be pleasant....with........ Everybody

Mọi người giúp mình với, mình đang cần gấp, xin cảm ơn ạ

IV/ fill in the blank with an appropriate preposition

1. The Ao dai consists ......of.......a long silk tunic thatis slit on the sides and worn over loose pants

2. My sister was born......in...... 30th April 2006

3. We should travel......at....... 7 o'clock in the morning

4. Do you often spend your friends and relatives beautiful cards......at....... Christmas

5. There are footnotes written......in...... The bottom of each page in this book

6. Try to be pleasant......with...... everybody

IV/ fill in the blank with appropriate prepositions

1. How far did he drive ?-.......at.....30 miles an hour

2. How many chapters does this book consist.....of......?

3. Vietnam is famous.......for..... Its cultural heritages

7. I will be home ........on....... Sunday November 5

8. This brochure is full......of.....useful information

9. They still keep in touch.......with....... Each other

10. She doesn't depend......on...... Her parents

1,of

2,by

3,in

4,at

5,in

6,of

7,for

8,on

VI/ Fill in each gap with an appropriate preposition:

1. My class consist of thirty-five members.

2. Traditionally, the ao dai was frequently worn by men and women

3. Women usually wear the ao dai on special occasions.

4. What do you usually wear on the weekends ?

5. Jeans cloth was made in Europe.

6. Jeans cloth was made from cotton in the 18th century.

7. It is necessary for students to wear uniform.

1. in

2. in

3. on

4. on 

5. on

6. by

7. in

8. by

9. on

10. on

1. in

2. in

3. on

4. on 

5. on

6. by

7. in

8. by

9. on

10. on

PTHH: \(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

Ta có: \(\left\{{}\begin{matrix}m_{H_2SO_4}=588\cdot5\%=29,4\left(g\right)\Rightarrow n_{H_2SO_4}=\dfrac{29,4}{98}=0,3\left(mol\right)\\n_{Al_2O_3}=\dfrac{20,4}{102}=0,2\left(mol\right)\end{matrix}\right.\)

Xét tỉ lệ: \(\dfrac{0,2}{1}>\dfrac{0,3}{3}\) \(\Rightarrow\) Al₂O₃ còn dư

\(\Rightarrow n_{Al_2\left(SO_4\right)_3}=0,1\left(mol\right)=n_{Al_2O_3\left(dư\right)}\)

\(\Rightarrow C\%_{Al_2\left(SO_4\right)_3}=\dfrac{0,1\cdot342}{20,4+588-0,1\cdot102}\cdot100\%\approx5,72\%\)

I/ fill in each sentence with one suitable word

1. She is .......getting......tired that she can't do anything

2. He used......to....be a successful man

3. They asked me.......if.... I like that school

4. She couldn't come here.......because..... She was busy

5. She didn't leave, ......so.....she missed the train

6. It was.....such.....a boring film that we went to bed before it ended.

7. They wish they ......were......healthier

8. We usually travel to HCM city......by....... Air

9. They didn't arrive......on.....time to save the boy

10. She was born........in..... 1982

\(d,ĐK:x\ge1\\ PT\Leftrightarrow\sqrt{x-1}=2+\sqrt{x+1}\\ \Leftrightarrow x-1=2+x+1+4\sqrt{x+1}\\ \Leftrightarrow4\sqrt{x+1}=-4\Leftrightarrow x\in\varnothing\left(4\sqrt{x+1}\ge0\right)\\ g,ĐK:x\ge\dfrac{1}{2}\\ PT\Leftrightarrow x+\sqrt{2x-1}+x-\sqrt{2x-1}+2\sqrt{\left(x+\sqrt{2x-1}\right)\left(x-\sqrt{2x-1}\right)}=2\\ \Leftrightarrow2x+2\sqrt{x^2-2x+1}=2\\ \Leftrightarrow\sqrt{\left(x-1\right)^2}=\dfrac{2-2x}{2}=1-x\\ \Leftrightarrow\left|x-1\right|=1-x\\ \Leftrightarrow\left[{}\begin{matrix}x-1=1-x\left(x\ge1\right)\\x-1=x-1\left(x< 1\right)\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=1\left(tm\right)\\x\in R\end{matrix}\right.\)

1 What's the matter with my sister's children?

2 The weather is often warm in spring

3 Hoa was born in HN on 5th January