ti so thoi gian di 

5:7 = 5/7

vi quang song ko doi nen thoi gian ti le nghic voi van toc 

5/7 chinh la ti so van toc di nguoc dong va xuoi dong

hai lan van toc dong nuoc chinh la hieu van toc

Vi

Vthuc + V dong nuoc = V xuoi dong =V thuc + 1 V dong nuoc 

V thuc - V dong nuoc = V nguoc dong = V thuc - 1 V dong nuoc

Vay

V xuoi dong - V nguoc dong = V dong nuoc + V dong nuoc= V dong nuoc X 2

van toc xuoi  dong la

60 : (7-5)x5=210 m /phut

210 m/phut =1260m/phut = 1,26 km/phut 

quang duong AB dai la

1,26 x 5 =   6,30km

dap so 6,30 km

**** !

1 she has fewer books than me

2 this exercise is easier  than that one

chia động từ trong ngoặc
I have your telephone number  . I (call ) will calll ........................you soon 
She ( be )  .is......................in class at the moment 
I (be ).....am........................tired now
Don't worry . I (be ) .will be....................on time tomorrow
My wife (cook ) ..cooks...................very well 
You ( not ,be ) ..won't be..... .......................able  to come here next week 
WiilYou (be ).be.................free tomorrow morning ?
They (not, be) .aren't......................good at Maths 
We (not , know ) don't know........how to play the game . can you help me? 
we (visit ) will visit....................you when we come to the city 

tìm lỗi sai và sửa lại

1. It takes Huy three hours doing his homework every evening- to do

2. Viet got up early and do morning exercises yesterday- did

3. Does Nam's mother always go to work by a bus- by a bus?

4. My father has less days off than Tim's father- fewer

5. Hoa prefers reading books to play video games- playing

6. After each lesson we often have a ten-minutes rest- minute

7. Million of foreign visitors come to Vietnam every year on their holiday- millions

8. Sorry, You can't speak to Loan because she has a bath- is having

9. My sister likes playing badminton but she doesn't play it very good- well

10. My brother doesn't like durians,and I don't like them, too - either

1. I don't have any troubles because my classmates are ( friend )...unfriendly.......

2. He speaks English the ( good )best .......... of all

3. He is one of the ( bore )  borest............ pesons I 've ever met

4. There are about 200 ..employee............ in this company ( employ )

5. That is a ( use ) useless............. machine. It does not work more

6. A person who writes books is called a ( write ). writen.............

7. Shakespeare is ( fame )  famous............ for his plays

8. Shakespeare is ( know ).well-known............. as the greatest name in English literature

9. They live in ( center )centrall ......... London

10. On the ( depend ) dependent............... Day, there are many meetings held by the government

Vi la 2 so le lien tiep nen hieu cua chung la 2. So be la : (336 - 2) / 2 = 167.

So lon la : 167 + 2 = 169. Cho **** nha mem

1. Miss Lan runs fast -> Miss Lan is .a fast runner...........

2. Thoa sings smoothly -> Thoa is a smooth singer..............

3. No one can run faster than me -> I am the fastest runner...............

4. Because of the bad weather, we had to stop our picnic -> The bad weather prevented us for our picnic .................

5. At school I like Math-> At school my favorite subject is Math ................

6. Shall I bring you a cup of tea ? -> Would . you .like  a cup of coffee.........

7. My sister is more hard-working than me -> I don't . work as hard-working as my sister does...............

8. Do you have a better refrigerator than this -> Is this the best refrigerator you have? ..............

9. Finding an apartment in a big city is not easy -> It is .not easy to find an apartment in a big city..............

10. Our summer vacation lasts two months -> We have a  two-month summer vacation.............

dùng hình thức will và kết hợp với mỗi động từ cho sẵn bên dưới
 MEET              VISIT            TEACH          GET         FLY 
  BE                    CLEAN         PAINT            HELP       COME/
 
he .will teach................us english next year
i ....will come...................to england to visit my son soon 
they ...will pain..............the wall next week
we will meet..............her in front of the cinema
you ...will clean..............the floor in this morning 
i ....will help.................her with  her homework
it ....will be..................very cold tomorrow
they...will visit...................to the hospital tomorrow
she.will fly.......him next month 
i ..will get.............there on time

Tìm từ có phần gạch chân phát âm khác:

1, A. fas             B. car             C. march           D. late

2, A. close          B. old            C. now              D. open

3, A. fine              B. nice           C. mine          D. miss

4, A. birthday       B. thirteen       C. that            D. thing

5, A. ready            B. teath           C. read           D. speak

6, A. poor             B. soon             C. tooth           D. stool

7, A. rained           B. liked            C. looked           D. watched

8, A. church          B. toothache         C. chair           D. couch

9, A. worried         B. studied            C. brushed        D. rained

10, A. invited         B. died            C. started           D. decided

give the correct form of the verbs given to finish the sentences.

1 Have              ever (do) done                         volunteer work ?

 Yes, I (join) have joined                 my school volunteer team last summer

2. I know a lot about Beijing because I (go) went                       there last summer

3. Sit down and watch TV, I (finish) will finish                        my work soon before I join you

4.Have You (ride)ridden                into town on your new bike yet?

5. They (not arrive)haven't arrived                        yet, but they should  be here soon

6. It's the first time I (get)have got                     all the answers right in a test

7.She (start)started                   doing the gardening an hour ago, and she (not finish)     haven't finished                        it yet

8.Eating fruit and vegetables every day (be)  is                 very healthy