RELATIVE PRONOUNS / RELATIVE ADVERBS

1. whose

2. who

3. which

4. which

5. whose

6. which

7. whose

8. where

9. which

10. whom

12. on which

13. where

14. whose

15. whose

16. whose

17. where

18. who

19. on which

20. whose

CAUSATIVE FORM

1. The boss had the letter typed by the secretary.

2. The boy had a picture drawn.

3. The master had the floor cleaned.

4. They had their luggage carried upstairs.

5. He has his bicycle fixed by his brother.

6. My father had this door repainted.

7. His mother had those chairs cleaned.

8. She had all her clothes made in Ho Chi Minh City.

9. My mother has the roses watered every day.

10. He has his car washed twice a month.

11. He will have his car washed.

12. He is going to have his video repaired by an electrician next week.

~REWRITE SENTENCE~

1.Because of a traffic jam,the students arrived late.

2:Because of the heavy traffic,I can't drive fast.

3:Because of the large stream,they had to choose another way....

4:Because of his impoliting sentence,he was purnished.

5:Because of starting giame,Jan was worried.

6:Because og noise,he couldn't sleep.

7:Because of being very hurried,he didn't wait for us.

8:Because of heavy traffic,we were late for the meeting.

9:Because of his lazineess,Tom gets bad marks.

10:Because he was old,he couldn't continute to work.

11:We had to stay at home because the weather was bad.

12:Because of good behaivior,evryone loves her.

UNREAL CONDITION

1) If my father was here now, he could help you.

2) If the children went to the circus, they would see the performing animals.

3) If the buses weren't full up, they would stop.

4) If I were good at English, I could read this book.

5) If he wasn't tired, he could score a goal.

6) If they were at home today, they would meet their aunt.

7) If Peter didn't drink too much coffee, he could sleep.

8) If the weather was nice today, we would go to the zoo.

9) If the boy had some books, he could write that composition better.

10) If I knew his address, I could visit him.

11) If we had a bicycle, we could go there for a picnic.

12) If tickets weren't expensive, we would visit Hanoi.

TENSES AFTER WISH

1) I wish the referee were fair.

2) They wish the water wasn't polluted.

3) I wish I knew German and Spanish.

4) They wish they had a sightseeing ride about London.

5) I wish they would come with us.

6) I wish she wouldn't leave for France next month.

7) I wish you could come to the party.

8) I wish we had a torch.

9) I wish I didn't have to work today.

10) I wish I wouldn't have to work tomorrow.

I.

1. B. museum

2. D. important

3. C. impression

4. C. politeness

II.

5. C. missed

6. D. gauge

7. A. intended

8. B. organize

III.

9. C. impressed

10. B. invite

11. C. while

12. A. to leave

13. D. widely

14. B. knowledge

15. C. annoyed

16. B. from

a) \(k=-5\)

b) 

Tìm x xong rồi tìm y

3 thì làm kiểu gì cũng được

Bài 3:

Hình 1:

Xét ΔABC có \(\widehat{A}+\widehat{B}+\widehat{C}=180^0\)

=>\(x+60^0+40^0=180^0\)

=>\(x=180^0-100^0=80^0\)

Hình 2:

Xét ΔABD có \(\widehat{ADC}\) là góc ngoài tại đỉnh D

nên \(\widehat{ADC}=\widehat{ABD}+\widehat{BAD}=110^0\)

=>\(y=110^0\)

ΔDAC cân tại D

=>\(\widehat{DAC}=\widehat{DCA}=\dfrac{180^0-\widehat{ADC}}{2}\)

=>\(x=\dfrac{180^0-110^0}{2}=35^0\)

Hình 3:

Ta có: \(\widehat{CAB}+60^0=180^0\)

=>\(\widehat{CAB}=180^0-60^0=120^0\)

Xét ΔCAB có \(\widehat{CAB}+\widehat{ABC}+\widehat{ACB}=180^0\)

=>\(x+2x+120^0=180^0\)

=>\(3x=60^0\)

=>\(x=20^0\)

Hình 4:

Ta có: \(\widehat{ADC}+\widehat{ADB}=180^0\)

=>\(\widehat{ADB}=180^0-80^0=100^0\)

Xét ΔADB có

\(\widehat{ADB}+\widehat{ABD}+\widehat{BAD}=180^0\)

=>\(x+60^0+100^0=180^0\)

=>\(x=20^0\)

ta có: \(\widehat{ACD}+135^0=180^0\)

=>\(\widehat{ACD}=180^0-135^0=45^0\)

Xét ΔACD có \(\widehat{ACD}+\widehat{ADC}+\widehat{DAC}=180^0\)

=>\(y+80^0+45^0=180^0\)

=>\(y=55^0\)

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

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

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