1. The worker are building a supermarket on our street.

A supermarket are being built on our street by the workers.

2. The zoo keapers feed the animals twice a day

The animals are fed twice a day by the zoo keeper.

3.They have sold their car to pay their dept

Their car has been sold to pay their dept.

4. We are going to grow flowers in the front garden

Flowers in the front garden are going to be grown.

5. You musn't use this machine after 5:30 pm

This machine wasn't be used after 5:30 pm.

6. My grandmother is knitting a neww sweater for me

A new sweater is being knitted for me by my grandmother.

7. Did people make jeans two hundred years ago ?

Were jeans made two hundred years ago ?

8. We don't use this kind of cloth to make shirts ,

This kind of cloth isn't used to make shirts.

9. Vietnamese women continue to wear the unique and fashtionable ao dai

The unique and fashtionable ao dai is continued to wear by Vietnamese women.

10. They repaired my desk during the weekend.

My desk was repaired during the weekend.

leave - left

buy - bought

write - written

finish - finished

watch - watched

give - given

rain - rained

walk walked

get - gotten

1.I can not sleep because my neighborhood is very noisy.

3. You should not step on the grass .

4. Which city would you like to visit?

I just have seen Andrew and he says he has already done about half of the plan.

eat - eaten

come - come

work - worked

be - have/has been

do - done

see - seen

have - had

play - played

realize - realized

go - gone

know - known

take - taken

live - lived

lose - lost

Fill each blank with a word from the box:

amazing/ relaxed/ fantastic/ films/ cinema/ awards/ section/ boring/ successful/ interested

1. All the critics said film was really ____boring______. Nevertheless, I was so interested that I saw it from beginning to end.

2. Avatar is a big hit - the special effects are ________amazing________.

1. _________ he spent much money on the film, it wasn't a big success.

A. Even B. But C. Although D. Despite

2. I enjoyed the film on TV yesterday evening __________ nobody in my family liked it.

A. although B. yet C. in spite of D. so

3. We didn't find it funny _______________ it was a comedy.

A. in spite of B. despite C. although D. but

Điều kiện xác định \(a\ge0,a\ne1.\)

Ta có \(P=\left(\frac{\sqrt{a}-2}{a-1}-\frac{\sqrt{a}+2}{\left(\sqrt{a}+1\right)^2}\right)\cdot\left(\frac{a-1}{2}\right)^2=\frac{\left(\sqrt{a}-2\right)\left(a-1\right)}{4}-\frac{\left(\sqrt{a}+2\right)\left(\sqrt{a}-1\right)^2}{4}=\frac{\sqrt{a}-a}{2}.\)

Từ đây ta có \(P=\frac{\sqrt{a}-a}{2}=\frac{-\left(\sqrt{a}-\frac{1}{2}\right)^2+\frac{1}{4}}{2}\le\frac{1}{8}.\)  Dấu bằng xảy ra khi \(a=\frac{1}{4}\). Vậy giá trị lớn nhất của P là \(\frac{1}{8}.\)
 

* When did you arrive?

- I arrived 2 days ago.

* Who are you with?

I went with my friends.

* Where are you staying?

We stayed in a small hotel near the centre park.

* What have you done?

I've have visited Eiffel Tower.

* What are you doing tomorrow?

I am going to buy some souvernirs

* How are you feeling?

1. Mai has never watched a 3D movie.

2. Thu has never eaten snails.

3. Lan has never stayed in a hotel.

4. Minh has never climbed Mount Fansipan.

5. Linh has never been on TV.