Sua loi sai:

1. Our manager suggested (that) we (woud) work (overtime) (this week)

2. (Quite by chance), Tom (ran) (in) an old friend (at the airport)

3. I didn't have (enough) time (to study), (and) I managed (to pass) the exam

4. (How about) going (to) the park and (play) volleyball (there)?

5. It (rained) all day (so) the weathereman (had promised) (sunny) weather

6. (Taking care to) the children (can be) a (demanding) and (time-consuming) job

7. Don't (give out) yet, you will (soon) (be able to) speak english (fluently)

8. The doctor (says) that it (will take) her (a long time) (to get up) the shock

9. Tom, (hurry up)! (It's time) to (get out) and (go to school)

10. If the book (belonged for) me. I (would) lend it (to you), but it (doesn't)

Khoanh truoc cau tra loi dung:

1. For most North American households, lighting.....10 percent to 15 percent of the electricity bill

A. explaines to B. says to C. accounts for D. tells to

2. A label tells the....how much energy efficiney each product has

A. workers B. players C. doers D. consumers

3.We can ruduce the electricity consumption by replacing ordinary light bulbs with.....bubls

A. money-saved B. energy-saved C. energy-saving D. money-saving

4. Energy from the sun, the wind, the water are....

A. natural resources B. nature sources C. planet energy D. the world power

5. We are looking at the problem of energy because the world's energy resources of coal, oil and gas are...

A. available B. limited C. safe D. workable

6. The energy from the sun, the waves, the wind can....forever

A. spend B. stay C. last D. use

7. The weather was very nice......we decided to have dinner in the garden

A. and B but C so D.or

8. Tom suggested......money to help poor people

A. to save B. save C. saving D. or

9. Would you like green tea.....milk tea?

A. and B. but C. so D. or

10. She cleaned the house.....cooked dinner before her parents got home

A. and B. but C. so D. for

11. My mother always.....me.....from school at 5pm

A. picks/up B. picks/out C. picks/off D. picks/in

12. Have a good trip and.....yourself,dear

A. look into B. look out C. look up D. look after

13. I think I've lost my new fountain pen. I've.....it everywhere and I can't find it anywhere

A. looked into B. looked for C. looked after D. looked out

14. My father.....smoking many years ago

A. gave up B. gave in C. gave of D. gave out

15. I am used to....early in the morning to do some physical exercise

A. getting on B. getting out C. getting up D. getting down

16.....she finds Japnanese very difficult, she enjoys learning it

A. because B. although C. however D. but

17. If we.....wastin g water, there will be a shortage of fresh water in the near future

A. go up B. go in C. go on D. go off

18. His family was very poor,.....he had to work at an early age

A. because B. so C for D. but

19.......Daisy didn't like to swim. She played on the beach with her sister

A. when B. after C. however D. since

20. It was raining....they cancelled the trip to the mountains

A. although B. because C. so D. when

21. They've known each other....they were at high school

A. since B. when C. as D. while

22. John is....a kind boy that everyone likes him

A. so B. very C. such D. as

23......it was a formal dinner party. Tom wore his blue jeans

A. because B. as C. while D. although

24. They traveled for many days.....they found the river

A. while B. until C. when D. as

25. They first met.....they were at high school

A. where B. since C. when D. until

26. I like to spend my holidays in the mountai,....my wife prefers the seaside

A. so B. but C. and D. as

Tim loi sai:

1. (If) you forget his (telephone number) you (could) (look it) up in the telephone directory

2. We (wanted to know) why you (didn't come) to the (class) meeting the (day before)

3. I can't(go on) a holiday (unless) I (don't have) (some money)

4. The stream (is covered) (with) (foam). This water is (polluting)

5. If you (are going to) start (getting) (silly ideas), I (would take) you home right away

6. How (wonderful)! I'm (amazing) (that) I could win the (first prize)

7. The baby (laughed) (happy) (as) she played (with) her toys

8. I have a (broken leg) (because) I (fell over) while (I playing) basketball

9. (Mary's) parents were (extreme) (pleased) thet she (won) the contest

10. Fish catching by (electricity) is (dangerously) because people (may) die from electric (shock waves)

Khoanh truoc cau tra loi dung:

1. Give my best wishes to your parents. I hope they are....

A. well B. good C. nice D. badly

2. If he....more money he'll have to do more work

A. want B. wants C. wanted D. will want

3..... Tom comes on time, we'll go without him

A. If B. when C. unless D. whenever

4. I'm ....that you didn't phone me about the meeting

A. disappoint B. disappointed C. disappointing D. appointed

5. If we go on littering, our environment will become seriously....

A. pollute B. polluting C. polluted D. pollutedly

6. Mr.Lum speaks english quite.....

A. well B. good C. bad D. terrible

7. The old man went...across the street

A slow B. slowly C. fastly D. hardly

8. If we...the water, we will have no fresh water to use

A. pollute B. polluted C. polluting D. pollutedlly

9. I'm...that I can have a summer holiday abroad

A. excite B. excitng C. excited D. excitement

Khoang truoc cau tra loi dung:

1. Don't.....We have to keep our schoolyard tidy and clean

A. litter B. put trash C. waste D. reduce garbage

2. We are all slowly destroying the earth by ... our environment

A. setting B. polluting C. minimizing D. confining

3. The earth's natural.....will run out

A. sources B. forces C. resources D. courses

4. There is a lot of eshaust fume in the air, so there is....

A. atmosphere dirt B. air pollution C. air traffic D. atmosphere dust

5. This river is polluted: a lot of fish died and floated on the.....

A. water line B. water face C. water front D. water surface

6. It's dangerous to use....to cash fish. People many die from electric shock waves

A. electricity B. fish hooks C. fish net D. fish rods

7. The loca authority should....the fish catching by electricity

A. allow B. permit C.prohibit D. give up

8. We can't swom in the river. There is trash...on the water surface

A. swimming B. floating C. diving D. bathing

9. The news that he died of AIDS was a great....

A. humour B. talk C shock D. pain

10. It rained....for three days

A. continue B. continues C. continuing D. continuously

11. ......if we take a map

A. We will get lost C. We won't get lost

B. We would get lost D. WE wouldn't get lost

12. We won't take a break....we finish our work

A. after B. until C. when D. as

13. Bob does not go to work today. He...ill

A. may be B. maybe C. ought to be D. will be

14. Why were you so....when I saw you yesterday?

A. friendless B. unfriendly C. friendly D. friendship

15. I'll look for another job....my salary is increased

A. if B.when C. as D. unless

16. We.....more shade and fresh air if we plant more trees along the streets

A. had B. will have C. have D. would have

17. We can't do the job...Jack helps us

A. unless B. if C. when D as

18. If you stand on this old table, it.....

A. collapse B. may collapse C. would collapse D. collapsed

19. If it....fine tomorrow we'll go for a walk

A. be B. is C. was D. would be

20. You are speaking very quietly. I can....hear you

A. hard B. hardy C. hardly D. hardness

Cho 2 duong thang (d):\(y=\left(m-3\right).x+5\) voi \(m\ne3\)

(d'):\(y=-m^2x+2\) voi \(m\ne0\)

Tim m de (d) cat Ox tai A, cat Oy tai B sao cho goc BAO=60 do

Tim GTNN cua \(\dfrac{\sqrt{x}+\sqrt{y}}{4}\)

Giai phuong trinh va he phuong trinh:

a) \(\sqrt{x^2+6}=x-2\sqrt{x^2-1}\)

b) \(x^2+3x+1=\left(x+3\right).\sqrt{x^2+1}\)

c) \(\left\{{}\begin{matrix}x^2+y^2=11\\x+xy+y=3+4\sqrt{2}\end{matrix}\right.\)

So sanh: x=\(\sqrt{2019}\) va y=\(2\sqrt{2018}-\sqrt{2017}\)

Tim GTNN cua A=\(\dfrac{a^2}{b+c}+\dfrac{b^2}{c+a}+\dfrac{c^2}{a+b}\) voi a,b,c la cac so duong va a+b+c=6