1B
2D
3C
4B

If only I were a doctor.

I wish she could attend my wedding next week.

2. What will you do this Sunday?
3. My parents will buy a computer for me.
4. I will come to your birthday party next week.
5. My uncle will go to Bali tomorrow morning.
6. Sally will do her homework tonight.

It's very dangerous to play near the river.

1. us
2. it
3. it
4. him
5. her
6. me

\(\dfrac{6}{7}+\dfrac{7}{8}=\dfrac{48}{56}+\dfrac{49}{56}=\dfrac{97}{56}\)
 

\(\dfrac{4}{7}-\dfrac{11}{42}=\dfrac{24}{42}-\dfrac{11}{42}=\dfrac{13}{42}\)
 

\(\dfrac{5}{3}\times\dfrac{2}{7}:\dfrac{4}{9}=\dfrac{10}{21}\cdot\dfrac{9}{4}=\dfrac{15}{14}\)
 

\(\dfrac{2}{11}:\dfrac{1}{3}\times\dfrac{2}{5}=\dfrac{2}{11}\times3\times\dfrac{2}{5}=\dfrac{6}{11}\cdot\dfrac{2}{5}=\dfrac{12}{55}\)

a) Ta có:
\(3^{35}=3^{7\cdot5}=2187^5\)
\(5^{20}=5^{4\cdot5}=625^5\)
Mà \(2187>625\) => \(3^{35}>5^{20}\)

b) Ta có:
\(37^8=37^8\)
\(2^{32}=2^{4\cdot8}=16^8\)
Mà \(37>16\) => \(37^8>2^{32}\)

1. If Lucia had been here now, she would find out the truth about her uncle's accident. 
=> were
2. Unless we leave a bowl of water under the sun, it will evaporate. 
=> If
3. If I had knew the time when the match started, I would have told you. 
=> known
4. If I am 10 centimeters taller, I would play basketball. 
=> were 
5. If the doctors could find in the remedy, a lot of people would be saved. 
=> bỏ
6. If I had realized that the traffic lights were red, I would stop. 
=> realized
7. What you would do if you could speak French well? 
=> would you do
8. If I had known he is not at home, I wouldn't have gone all the way to his house. 
=> was not
9. If had I known you were in financial difficulty, I would have helped you. 
=> I had
10. If I were you, I will go to the dentist's and have the tooth checked.
=> would
11. If you hadn't left the car unlocked, it wouldn't have be stolen. 
=> been
12. What would happen because I pressed that red button? 
=> if
13. If the weather is fine today, we would go to the beach. 
=> will
14. If you will study harder, you will surely pass the coming exams with good results. 
=> bỏ
15. If the weather weren't too bad, we would to go swimming. 
=> bỏ
16. If he weren't too old, he would apply to the job as a war reporter. 
=> for
17. If drivers obeyed the speed limit, fewer accidents occur.
=> would occur
18. If I would have studied Russian at school, I would have understood him easily.
=> had studied
19. If tomorrow the weather will be bad, the match will be postponed. 
=> is
20. If you saw Mike today, please ask him to phone me. 
=> see