1. The farmers..........in the field now.

A. were working B. have worked C. worked D. are working

2. The rom ..........when I arrived.

A. was being cleaned B. is ceaned C. was cleaning D. was cleaned

3. The next meeting .....in May.

A. will hold B.will be held C. will be holding D. will have held

4. Mary Kate and Ashlay Olsen........their first book about twelve years ago.

A. were published B. published C. have published D. were publishing

5. He ....... his homework before he went to school.

A. had done B. have done C. has done D.did

6.The story I've just read........Jack London.

A. was written B. worte by C. was written by D. was written from

7.An accident often ......everyday.

A is happened B.happens C.happened D.was happened

8.English.... all over the world.

A.is spoken B.speak C.speaks D.to speak

9. Since we came here, we ........... a lot of acquaintances.

A. have had B. had C.have D.are having

10."Ms Jones, please type those letters before noon"_"They have allready.....,sir.They're on your desk"

A.typed B.been being typed C.being typed B.been typed

* Vinh keeps forgetting his homework

—> Vinh is...always forgetting his homework.....

keep doing something <=> be always + V_ing ( cấu trúc phàn nàn )

dùng từ gợi ý viết lại hoàn chỉnh

1 Lan / going / learn / english

Lan is going to learn English.
2 we / going / clean / banks / lakes /this weekend

We are going to clean the banks and the lakes this weekend.
3 Miss Jackson / ask / me / give / you / this / dictinary

Miss Jackson asked me to give you that dictionary.
4 they / study / this foreign language / for / 3 years

They have studied this foreign language for 3 years.

5 Tim / promise / try / best / learning spanish

Tim promise to try his best to learn Spanish.

45

tick rui minh giai chi tiet

viết lại câu
1 Nam is taller than Lam
Lan isn't .......as tall as Nam ..................
2 it takes Tam twenty minutes to walk to school evrey day
Tam spends.......20 minutes to to school every day.....................
3"you should keep your room tiday " my mother told me
my mother said........to me that I should keep my room tidy.........................
4 can you buy me some stams ? Tom said to me
Tom asked....me if I could buy him some stamps........................................
5 it's ten years since I last met my grandmother
I have.......not met my grandmother for 10 years...............

cả 2 đều là 5

Min \(3\sqrt{3}\Leftrightarrow x=y=z=3\) nhỉ

điền giới từ thích hợp

1/Do you go ....to........school.......on..foot or......by..bike

2/ My house is.....on...Le Lợi street,her house is....at.......9 Le Lai street.....by........Binh Chau school

3/The book......on....the back......of.....the library are....in......english

4/Nam sits..........between.........two school girls

5/Dictionaries are......on......the shelves.....on.....the left.....by......Math

6/The United states'library.......of.......Congress contains.....of.....100 milion books

7/My birthday is...............May first

\(\Leftrightarrow\left(1+x\sqrt{x^2+1}\right)\left(\sqrt{x^2+1}-x\right)=\left(\sqrt{x^2+1}-x\right)\left(\sqrt{x^2+1}+x\right)\)
\(\Leftrightarrow\left(\sqrt{x^2+1}-x\right)\left(1+x\sqrt{x^2+1}-\sqrt{x^2+1}-x\right)=0\)
\(\Leftrightarrow\left(\sqrt{x^2+1}-x\right)\left(\sqrt{x^2+1}-1\right)\left(x-1\right)=0\)
Tự giải tiếp nhé

3(n+2)chia hết n -2<=>(n-2)*3chia hết cho n - 2 <=>3 chia hết cho n -2 =>n-2 thuộc Ư(3)={1;3}

=>n=3 hoặc n =5