Complete the conditionals sentence:

1. What ___will___ we (do) _____do_____ if they do not come tomorrow?

2. If I had enough time now, I (write) ____would write____ to my parents.

3. It's to bad, Helen isn't here. If She (be) ____were____ here, she (know) ___would know____ what to do.

4. If I (eat) ___eat____ breakfast tomarrow morning, I (get)____won't get____ hungry during class.

5. If she (come) ___comes___ late again, she (lose) ____will lose___ her job.

6. I (let) _____will let____ you know if I (find) _____find_____ out what's happening.

7. If we (live) __lived___ ina town, life would be better.

8. I'm sure he wouldn't mind if we (arrive) ____arrived____ eraly.

9. We (phone) ____will phone_____ you if we have time.

10. If I won the lottery, I (give) _____would give____ you half the money.

11. It (be) ____would be___ a pity if she married Fred.

12. If I'm free on Saturday, I (go) __will go___ to the mountain.

13. She (have) ___will have____ a nervous breakdown if she goes on like this.

14. He didn't listen to the teacher. If he (listen) _____had listened___ carefully, he (perform) ___would have performed____ well in examination.

Cau 17: does / flow / the Nile River / into? / Which sea

=> Which sea does the Nile River flow into?

Cau 18: I hope / will / the fun. / you / come and join

=> I hope you will come and join the fun.

Cau 19: like to come / Would you / for lunch / to my house / on Sunday?

=> Would you like to come to my house for lunch on Sunday?

Cau 20: is / different from / your old one? / How / your new house

=> How is your new house different from your old one?

Cau 21: My new school is different ………from……the old one.

Cau 25: That is the ……most…… comfortable armchair I have.

Cau 28: David prefers pork………to……beef.

A on B at C at D for

Cau 29: Alex’s birthday is on the……….. of July.

A twelve B twelveth C twelfth D twelf

Cau 30: Lenka and Cristina ………to the cinema tonight. Would you like to come?

A shall go B will go C go D goes

Cau 31: lives with / his grandparents / Huy / Kim Ma street. /on

=> Huy lives with his grandparents on Kim Ma street.

Cau 32: the guitar / is learning / in his room. / to play / Steve

=> Steve is lsearning to play the guitar in his room.

Cau 33: a cold / and get / Let’s to go / drink. / the cafeteria

=> Let's go to the cafeteria and get a cold drink.

Cau 34: early in the morning / have to leave / the train. / They’ll / to catch

=> They'll have to leave early in the morning to catch the train.

Cau 35: There aren’t / movies on / at the moment. / any good

=> There aren;t any good movies on at the moment.

Cau 36: What……time……will you leave? I will leave at 9.

Cau 37: What……an….interesting movie!

Cau 38: Thanks for helping me. ……….pleasure.

Cau 39: Does he……tra….vel by bus? – No. by bike.

Cau 40: What time is it? It is……eleven ten… …… ……. ( 11:10)

Cau 41: What time is it? It is………………( 4: 45)

A half past five B fifteen past five C five forty five D a quarter to five

1.which of the following nouns are countable and which are uncountable?which phrases can you use with the uncountable nouns?(you may use a dictionary to help you)

1.spinach: uncountable noun

2.banana: countable noun

3.bread: countable noun

4.beef: uncountable noun

5.pepper: uncoutable noun

6.apple: countable noun

7.pork: uncountable noun

8.turmeric: countable noun

Rewrite.

1. for / are / not / good / Candies / children`s teeth

=> Candies are not good for children's teeth.

2. let`s / at / meet / tomorrow. / 7 pm

=> Let's meet at 7pm tomorrow.

3. has / small / my English / white / teeth / teacher

=> My English techer has small white teeth.

4. HCM museum? / tell me / Can / you / the way to

=> Can you tell me the way to HCM Museum?

5. is / My family`s / the wall. / picture / on

=> My family's picture is on the wall.

Give the correct forms or tenses of the verbs in brackets.

1. Water (boil) ..........boils......... at l00oc

2. Mr Hoa (teach) .........taught.......... English in this school since she (leave) .......had left.......... the university.

3. We (buy) ..........are going to buy.......... some souvenirs in Nha Trang next week.

4. I would like (tell) .........to tell.......... you about my family.

5. We (begin) .........began........... to learn English there years ago.

1. Brigit and Leticia were very close when they were at school together, but, as they followed their separate careers, they strated to ________

A. fear up

B. break down

C. grow apart

D. pull off

2. The bus company _______ the threat it had received, and so it checked all of his buses for explosives.

A. hit out

B. acted on

C. gave in

D. worked off

3.Because Portugal refused to peacefully ______ the territory of Goa _________ to India, the Indian government chose to liberate it by force.

A. hand ____ over

B. let _____ off

C. Turn on

D. give ____ out

4. In 1919, Sir Reginald Fleming Johnston was _________ as a tutor to Puyi, who was the last emperor of China.

A. brought about

B. taken on

C. caught out

D. kept in

5. The abbreviation IAEA ____________ the International Atomic Energy Agency, which seeks to prevent the buid up of nuclear weapons.

A. read over

B. does in

C. stands for

D. counts down

6. The teacher reminded us to be punctual __________ we would be detained after school.

A. and yet

B. or else

C. even if

D. and their

7.We were trying hard to convince her _________ she stood firm.

A. and

B. but

C. or

D. although

8. The center will be closed _________ renovation works until further notice.

A. even with

B. because

C. due to

D. despite

9. Jeremy is very active and enjoys exercising; _______, Chris sits on his couch all day playing video games.

A. Similarly

B. For example

C. In addition

D. On the other hand

10. Which of the following prepositional phrases CAN NOT be used in the following sentence? "Cathy is sick; _________, she cam to school today" .

A. Nevertheless

B. Still

C. As a result

D. Despite that

Ta có:

\(\left(1-\dfrac{1}{3}\right)\left(1-\dfrac{1}{3}\right)\left(1-\dfrac{1}{10}\right)...\left(1-\dfrac{1}{780}\right).x=1\)

\(\Leftrightarrow\dfrac{2}{3}.\dfrac{5}{6}.\dfrac{9}{10}.....\dfrac{779}{780}.x=1\)

\(\Leftrightarrow\dfrac{4}{6}.\dfrac{10}{12}.\dfrac{18}{20}.....\dfrac{1558}{1560}.x=1\)

\(\Leftrightarrow\dfrac{1.4}{2.3}.\dfrac{2.5}{3.4}.\dfrac{3.6}{4.5}.......\dfrac{38.41}{39.40}.x=1\)

\(\Leftrightarrow\dfrac{1.4.2.5.3.6.....38.41}{2.3.3.4.4.5.....39.40}.x=1\)

\(\Leftrightarrow\dfrac{\left(1.2.3.4....38\right)\left(4.5.6.7....41\right)}{\left(2.3.4.....39\right)\left(3.4.5....40\right)}.x=1\)

\(\Leftrightarrow\dfrac{1}{39}.\dfrac{41}{3}.x=1\)

\(\Leftrightarrow\dfrac{41}{117}.x=1\)

\(\Leftrightarrow x=\dfrac{117}{41}\)

Vậy ...

\(3,\left(18\right)=3+0,\left(18\right)=3+18.0,\left(01\right)=3+18.\frac{1}{99}=3+\frac{2}{11}=\frac{35}{11}\)

Sửa đề: tìm số tư nhiên A biết 276 chia A dư 36, 453 chia A dư 21

Ta có:

276 chia A dư 36 => 276 - 36 = 240 chia hết cho A

453 chia A dư 21 => 453 - 21 = 432 chia hết cho A

Đk: \(A\in\) N*

Ta có:

\(240=2^4.3.5\)

\(432=2^4.3^3\)

=> ƯCLN (240;432) = 2⁴ . 3 = 48

Vậy A = 48.

a, 5x^2 - 4x+1 = 0

Ta có: \(5x^2-4x+1=0\)

\(\Rightarrow\left(x-\dfrac{2}{5}\right)^2+\dfrac{1}{5}=0\) ( vô lý )

Vậy pt vô nghiệm.

b, x^2 - x - 6=0

Ta có: \(x^2-x-6=0\)

\(\Leftrightarrow x^2-\left(3x-2x\right)-6=0\)

\(\Leftrightarrow x^2-3x+2x-6=0\)

\(\Leftrightarrow x\left(x-3\right)+2\left(x-3\right)=0\)

\(\Leftrightarrow\left(x-3\right)\left(x+2\right)=0\)

\(\Leftrightarrow\left\{{}\begin{matrix}x-3=0\\x+2=0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=3\\x=-2\end{matrix}\right.\)

Vậy ...

c, 2x^2 +x-1=0

Ta có: \(2x^2+x-1=0\)

\(\Leftrightarrow2x^2+2x-x+1=0\)

\(\Leftrightarrow2x\left(x+1\right)-x-1=0\)

\(\Leftrightarrow2x\left(x+1\right)-\left(x+1\right)=0\)

\(\Leftrightarrow\left(x+1\right)\left(2x-1\right)=0\)

\(\Leftrightarrow\left\{{}\begin{matrix}x+1=0\\2x-1=0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=-1\\x=\dfrac{1}{2}\end{matrix}\right.\)

Vậy...