tìm và sửa lỗi

1. lan is my parents'daughter, so she is my brother => sister

2. everyday , dan and viet go => do earobics with their friends in the gym

3. to day we have math but we aren't => don't have it on saturday

4. the store is between we => our house and the movie theater

Find the word or phrase that is SIMILAR in meaning to he undelined one

1.Please test this coast just size

A.try on Btry out C.put on D.take off

2.You should review thí lesson again

A.look at B look up Clook over D.look out

3.When he becomes and adult, he wants to be a pilot

A.looks up B.picks up C.grows up D.turns up

4.Most high school students look up to the star player on the football team

A.envy B.respect C.trust D.Pursure

5.You may borrow my car if you will bring it back by five o'clock

A.give B.send C.return D,lend

Pt da cho <=> (x+3)(x-3-4(x+3))=0<=>(x+3)(-3x-15)=0 <=> x+3=0 hoặc -3x-15=0 <=> x=-3 hoặc x= -5

nếu bỏ con vi trùng vao thi sau 1 phút 58 giây thì sẽ đầy vi trùng

thich thi tick cho minh nha

81.I (not go)...........won't go...............away for my holidays next month because I haven’t got enough money.

82.Jane (travel).............will travel.........to Scotland on Saturday.

83.Tom has just bought a painting.Where does he (hang)............hang...............it?

84.Lan,Ann (come)............are going to come............tomorrow.

-oh,is she?What time does she (arrive)...................arrive................?

85.Will You (play)..............play............football tomorrow morning?

-Yes,but Nam(not play)................won't play................He has just hurt his leg.

give the correct form of the verb

1 the receptionist(welcome)...welcomed....the guests and (ask)..asked.....them to fill in the form

2 the car(break)...was broken..down and we (have)..had..to walk home

3 the boys(swim)..were swimming..while the girls were sunbathing(sunbathe)

4 my father (come).came..in,(look)..looked.around and (tell)..told.me to tidy up my room

5 as long as one group (prepare)...prepares..dinner,the others(collect)..will collect.wood for their campfire

6 while the parents(have)...were having.....breakfast,their children(run).ran..about

7 martha(turn)...turned...off the lights and (go) ....went..to bed

8 James (live)..lives..in a little village

9 after school,James(want)...wants...to become a banker

10 they(own)..had owned..the house since 1991

11 there(be)..is...a bank in a nearby town,but James(have)...has...to take the bus to get there

12 Dan (work)..has worked..here since last november

13 Jamie(be)....has been.....sick for two days now

14 they(have)....have had..those problems for a long time

15 James usually(wear)...wears...jeans and t-shirts,but while he (work)....is working....for the bank now ,he(wear)....wears....a suit and a tie

16 Tom doesn't enjoy(laugh)....being laughed..... at by other people

|a|=2

=>a=2 hoặc a=-2

|a+2|=0

=>a+2=0

a=0-2

a=-2

1. she didn't get up early so she was late for the meeting.

-> If she hadn't got up late, she wouldn't have been late for the meeting.

2. I lost the way to come back the hotel because I hadn't got the map of this city.

-> If I had got the map of this city, I wouldn't have lost the way to come back the hotel.

3. she felt so tired anh she couldn't go to the cinema with us

-> If she hadn't felt so tired, she could have gone to the cinema with us.

4. My father went to work yesterday so he didn't know what happened to me

-> If my father hadn't gone to work yesterday, he would have known what happened to me.

5. the teacher's question was so difficult that I couldn't answer.

-> If the teacher's question hadn't been so difficult, I could have answered it.

6. he missed the first bus because he didn't star earlier

-> If he hadn't started late, he wouldn't have missed the first bus.

7. she dailed the final exam because she didn't learn hard

-> If she had learnt hard, she wouldn't have failed the final exam.

8. because you don't stop immediately, I call your teacher

-> If you stopped immediately, I wouldn't call your teacher.

9. I couldn't phone Mary because I didn't know her telephone number

-> If had known Mary's telephone number, I could have phoned her.

10. I donn't know your decision so I can tell them

-> If I knew your decision, I could tell them.

11. The weather is so hot that we can't go out

-> If the weather wasn't so hot, we could go out.

12. ''you have just passed your exam. Congratulations!'' Tom said to me

-> Tom congratulated me on having passed my exam.

13. ''I've always wanted to be rich'' Hung said

-> Hung has always dreamed of being rich.

14. ''I did not steal your car'' She told me

-> She denied stealing my car.

15. ''Congratulation! You passed your exams'' they said to Maya

-> They congratulated Maya on passing her exams.

16. I am sorry. I break my promise'' She told me.

-> He congratulate ( ? )

17. ''Congratulation! you won the race'' He told me.

-> He congratulated me on winning the race.

18. ''I am sorry. i didn't not keep my promise.'' petter said to Hoa

-> Peter apologize Hoa for not keeping his promise.

19. ''I will pay for the meal'' My brother told me

-> My brother insisted on paying for the meal.

20. ''I have always wanted to love a rich man'' she told her close firend

-> She has always dreamed of loving a rich man.

1. Frank doesn't usually tell lies (tends)

=> Frank doesn't tend to tell lies.

2. Lan finds it normal npw to sort out other people's problems for them (used)

=> Lan is used to sorting out other people's problems.

3. Zoe often makes jokes about her problems (habit)

=> Zoe is in the habit of making jokes about her problems.

\(\dfrac{1+2a}{15}=\dfrac{7-3a}{20}=\dfrac{3b}{23+7a}\)

\(\Leftrightarrow\dfrac{1+2a}{15}=\dfrac{7-3a}{20}\)

\(\Leftrightarrow20\left(1+2a\right)=15\left(7-3a\right)\)

\(\Leftrightarrow20+40a=105-45a\)

\(\Leftrightarrow40a+20-105+45a=0\)

\(\Leftrightarrow85a-85=0\)

\(\Leftrightarrow a=1\)

Thay a = 1 vào, ta được:

\(\dfrac{7-3}{20}=\dfrac{3b}{23+7}\)

\(\Leftrightarrow\dfrac{1}{5}=\dfrac{3b}{30}\)

\(\Leftrightarrow b=2\)

Vậy a = 1 ; b = 2.