1. if today (be)..were .sunday, i (not have).wouldn't have..to go to school

2. I (be).would be..able to watch the football match ìf I (have).had.a tv

3.if they (be)..were.rich, they (help).would help.. poor people

4.what.would..you (do).do..if you (be)were...him?

5. if we (not lend).didn't lend..him some money, he (die)..would die..early

6.he (not understand)...ưouldn't understand.the question if he (not ask)didn't ask ...the teacher

7. if i (win)won-a big prize in a lottery, i (give)..would give..up my job

8.if i (be).were...you, i (tell).would tell...the truth

9.if i (have).have..enough time now, i (write).will write ..to my parents

10. if i (know)..knew..hiss address, i (go).would go...round and see him

1. It took Mr. Hoang half an hour to walk to work yesterday.

       Mr. Hoang spent.......an hour walking to work yesterday................................................

2. What is the price of this cap ?

      How much.......does this cap cost ..........................................................?

4. There are eight hundred stamps in Hoa’s collection.

            Hoa’s collection eight hundred stamps in Hoa's collection
3. Lan didn't go to school yesterday because of her sickness

            Because Lan was sick , she didn't go to school

5. Listening to music is more interesting than watching TV.

        I prefer listening to music to watching TV

1. if the wearther (be).is..nice tomorrow, we (drive).will drive.. to our farm

2. if we (send)..send..this message now, they (receive)..will receive .it in time

3. he (be).will be..angry if you (come).come..late again

4.if i (have).had..enough time, I (do).would do..this homework

5. I (take).would take..a photo of this beach if i (have)..had..a camera

6. you (be).will be,..punished if you (fail).fail... the exam

7if it (rain).rains...this weekend, we (stay).will stay..at home

8.she (do).would do..it if she (promise)..promised.you

9. what..would.you (do).do...if you (not have)..didn't have..money

10. the kitchen (look).will look..better if we (have).had..red curtains

B NHA

a= 3⁶ : 3²=3⁴

b= 4⁷ : 4³=4⁴

=>b>a vì 4⁴>3⁴

ko hoặc cs

tick mk nha

=0.73205080756

*Trích mẫu thử từ các lọ và cho tác dụng với quỳ tím.

- Mẫu làm quỳ tím hóa đỏ là HCl.

-Còn lại là KCl, K2SO4, K2CO3,KNO3.

* Cho các mẫu thử còn lại tác dụng với dd Ba(OH)2.

- Tạo kết tủa trắng là K2SO4.

         K2SO4 + Ba(OH)2 => BaSO4 + 2KOH

-Còn lại là KCl, K2CO3,KNO3.

* Cho các mẫu thử còn lại tác dụng với dd AgNO3AgNO3.

- Tạo kết tủa là KCl

         KCl   +   AgNO3 => AgCl +KNO3

- Còn lại là K2CO3 VÀ KNO3.

* Cho hai chất còn lại tác dụng với BaCl2.

- Tạo kết tủa là K2CO3.

         K2CO3 + BaCl2  => 2KCl  + BaCO3

-Còn lại là KNO3.

Tham khảo tạm

1.         A. exhausted           B. frightening              C. populous         D. stressful

2.         A. exciting               B. rural                       C. annoying           D. forbidden

3.         A . fascinating         B. ancient                  C. delicious            D. comfortable

4.         A.galleries               B. neighborhoods        C. museum            D. cultural 

5.         A. exhibition        B. disappointed            C . entertaining     D. interesting

6.         A. education           B. facility                       C. development    D. intelligence