1. I'm afraid I won't be able to come tomorrow

2. Because of the train strike, the meeting doesn't take at 9 o'cock

3. A : " Go and tidy your room."

B :" I didn't do it ! "

4. If it rains, we won't go to the beach.

5. In my opinion, she won't pass the exam.

6. A : " I'm driving to the party, would you like a lift? "

B :" Okay, I am not taking the bus, I'll come with you."

7. He doesn't buy the car, if he can't af ford it.

8. I' ve tried every thing , but he doesn't eat .

9.  According to the weather forecast, it won't snow tomorrow.

10. A :" I'm really hungry. "

      B :" In that case we aren't waiting for John. "

vì đó là tam giác cân nên 3 cạnh bằng nhau =>2 cạnh còn lại là 22-4=18

40 học sinh

16 học sinh nữ

\(A=\frac{2^a.2.73+2^a.2.57}{2^a.104}=\frac{2^a.\left(146+114\right)}{2^a.104}=\frac{260}{104}=\frac{65}{26}\)

1. The traffic was very heavy. By the time I (get)..got...to Mary's party, everyone already (arrive)..had aready arrived..

2. I will graduate in June. I (see) will see..... you in July. By the time I (see)..see...you, I (graduate).....will have graduated

3. On arriving at home I (find)..found...that she just (leave)..has just left... a few minutes before.

4. Half way to the office Paul (turn) .turned.... round and (go)..went... back home because he (forget)..has forgotten... to turn the gas off.

5. London (change) ..has changed... a lot since we first (come)..came... to live here.

 C=4/2.4+4/4.6+4/6.8+...+4/2008.2010
 C = 2 ( 2 / 2.4 + 2/4.6 + 2/6.8 + ...+2/2008.2010)
 C = 2 ( 1 - 1/4 + 1/4 - 1/6+1/6 - 1/8 +....+1/2008 - 1/2010 )
 C = 2 ( 1 - 1 / 2010 )
 C = 2 . 2009/2010 
 C = 2009 / 1005
Chúc bạn học tốt !

B = \(\frac{1}{25.27}\)+ \(\frac{1}{27.29}+\frac{1}{29.31}+...+\frac{1}{73.75}\)
2B = 2 ( 1/25.27+1/27.29+1/29.31+...+1/73.75)  Mình x 2 lên tí phải chia cho 2
2B = \(\frac{2}{25.27}+\frac{2}{27.29}+...+\frac{2}{73.75}\)
2B = 1/25 - 1/27+ 1/27-1/29 + .... + 1/73 - 1/75
2B = 1/25 - 1/75
2B = 3/75 - 1/75
2B = 2/75
=> B = 2/75 : 2
  B = 2/75 . 1/2
  B = 1/75
Chúc bạn học tốt 

bạn tách ra từng bài một mình sẽ giúp 

cạnh hình vuông có chiều dài là :

24 : 4 = 6

diện tích hình vuông là:

6x6 = 36 ( cm²)

đáp số: 36 cm²

1. Ba / go / doctor / yesterday/ because / he / awful / stomachache.

… Ba went to the doctor yesterday because he had an awful stomachache.

2. I / not like / eggs / and / my brother / either.

…I don’t like eggs and my brother doesn’t, either.………………………………………………………………………………….

3. “ Balanced diet” / mean / you / eat / variety / foods / without / eat / much / anything.

…… “Balanced diet” means you eat a variety of foods without eating much of anything…………………………………………………………………………………

4. Millions / people / catch / common cold / year.

… Millions of people catch the common cold every year.…………………………………………………………………………………

5. Recess / yesterday / Trang / drink / some water/ and / talk / friends.

At recess yesterday Trang drank some water and talked with/ to her friends.
Chúc bạn học tốt !