A

PTK của Ca(NO₃)₂ = 40+(14+16.3).2=164 đvC

C

C

so sánh: +công cha với núi thái sơn
               +nghĩa mẹ với nước ở ngoài biển đông
=>ca ngợi công lao trời biển(cù lao chín chữ) của cha mẹ là cao cả, bao la, rộng lớn không thể nhìn thấy hết

g) => 55-x=0 hoặc 2x-44=0
    =>x=55 hoặc x=22
h) x²=9
=>x=-3 hoặc x=3
i) =>(x+1)³=8
=>x+1=2
x=1
j)5(x-2)²=125
(x-2)²=25
=>x-2=5 hoặc x-2=-5
=>x=7 hoặc x=-3

1. The art gallery is oppsite our school
2. My house has a living room, a bedroom and a bathroom
3. Phong's favorite is sciense
4. Phuong never goes to school late
5. Where do you live, Ngoc?

Ex 3: Mark A, B, C, or D to indicate the correct answer to each of the following
questions.
1. I’m told you are ill. I hope you ________ better again.

A. will feel B. feel C. are feeling D. don’t feel
2. ______ you ______ to school every morning?
A. Does ... walk B. Do ... walk C. Will... walk D. Are ...
walking
3. He enjoys ________ cycling at the weekend.
A. to go B. going C. goes D. go
4. My grandparents don’t like ________ in the city because it’s noisy and crowded.
A. live B. lived C. living D. to living
5. Why don’t you take ________ a new hobby?
A. up B. in C. over D. after
6. I find collecting sport cars ________. It costs a lot of money.
A. inexpensive B. cheap C. expensive D. cheapness
7. Be careful not to drop it; it’s very ________.
A. unique B. fragile C. difficult D. unusual
8. I see a ________ doing the gardening over there.
A. collector B. reporter C. gardener D. teacher
9. Eating too much ________ will be harmful for your health.
A. vegetables B. junk food C. healthy food D. fresh food
10. Eating ________ drinking healthy things will keep you fit.
A. or B. although C. but D. and
11. Don’t drink too much milk,________you will gain your weight.
A. so B. or C. and D. but
12. The doctor advised him to play more sports and ________ computer games.
A. more B. little C. less D. least
13. My brother eats a lot of junk food, so he ________ on a lot of weight.
A. turns B. takes C. brings D. puts
14. He looks so ________. He can’t keep his eyes open!
a. happy B. tired C. healthy D. fit
15. She looks very tired. She should work ________ or she will get sick.
a. well B. less C. more D. enough
16. She stays in ________ by exercising daily and eating well.

 A. healthy B. fit C. size D. shape

17. The ________ are children who don’t have their own houses to live in.
A. young children B. street children C. rich children D. weak
children
18. We usually collect ________ and food to provide to the homeless.
A. old clothes B. garbage C. rubbish D. cans
19. My father ________ the bike for me already.
A. bought B. will buy C. has bought D. buys
20. We should take care________ poor people.
A. in B. on C. with D. of
21. I ________ an interesting news from my best friend yesterday.
A. have heard B. heard C. hear D. did hear
22. My friends and I sometimes ________ blood to cure patients in hospitals.
A. bring B. donate C. take D. make
23. ________ people usually live on the streets, under bridges, or in camps.
A. Sick B. Homeless C. Elderly D. Disabled
24. I’ve ________ seen this film. Let’s watch something else.
A. never B. ever C. already D. yet

1.B
2. A
3. A
4. B
5. D
6. A
7. C
8. B

XVIII. Khoanh tròn đáp án đúng:

1. What subject do you like ..........  ?

a. most                         b. best                          c. English                     d. in

2. This is the story ..........   my class.

a. of                              b. to                              c. with                          d. for

3. Are you writing a letter..........  her?

a. for                             b. about                        c. to                               d. from

4. I’m reading a book ..........  Santa Claus.

a. about                        b. to                              c. from                          d. with

5. Did your father read a letter .............  your sister, yesterday?

a. for                             b. from                         c. about                        d. of

6. The teacher is telling a story ............   the students.

a. for                             b. about                        c. to                               d. from

7. We are learning ...............   animals and plants .......  French.

a. for – in                     b. about – in                c. to – of                       d. about - of

8. I’m doing my homework. Let’s play chess ........... .a. earlyb. latec. laterd. too

9. There is a market ..............  my house.

a. near                          b. on                             c. in                               d. from

10. ......... the break time, we never play voleyball.

a. in                              b. during                      c. until                          d. before

11. I often play football .......... the schoolyard with my friends.

a. on                             b. side                          c. in                               d. in frond of

12. What did you do .........  Ha Long Bay?

a. the                            b. in                              c. from                          d. at

13. My brother usually goes fishing ..........   quiet dard.

a. in                              b. during                      c. until                          d. after

14. What did her friends do .........  ?

a. there                         b. tonight                     c. homework               d. every day

15. Can you tell me ..........  your school?

a. to                              b. from                         c. about                        d. with

16. Let’s sing a song ....... A, B, C.

a. for                             b. from                         c. about                        d. of

17.  Say good bye ......... Miss Mai.

a. about                        b. to                              c. from                          d. with

18. There’s a small cloud ......... there.

a. over                          b. in                              c. next                          d. behide

19. Next weekend, they are watching a foot ball match between Liverpool and Manchester United.........Oxford stadium.

a. of                              b. in                              c. from                          d. at

20. The first month ...... the year is january?

a. at                               b. about                        c. of                              d. in

21. When are you coming ........... HaNoi? .........  three days.

a. after – back             b. back – after             c. from – at                  d. from - in

22. ...........  where’s the museum? Well, go......... turn right. It’s on your left.

a. sorry – ahead          b. excuse me – ahead      c. sorry – to            d. excuse me - ing

23. I’m going to Ho Chi Minh city ........ boat.

a. by                             b. on                             c. in                               d. with

24. My mother ............. to work at 6.00 am.

a. is going                    b. goes                          c. went                          d. go

25. Look! Lan ............ her exercises in the class.

a. does                          b. do                             c. is doing                    d. did

26. I .............. a football match with my girl friend, tonight.

a. watched                   b. watch                       c. am watching            d. am going to watch

My sister ........... English subjects three years ago.

a. teach                        b. teached                    c. teaches                     d. is teaching

27. We often go to sleep early but we went to bed ........ yesterday.

a. late                           b. too                            c. on                              d. at

28. Miss Hoa and her boy friend are in the kitchen. They..........

a. cook                         b. cooked                     c. are cooking             d. cooks

29. I.......... with my ant in Hue in 2008.

a. live                           b. am living                 c. lives                          d. lived

30. Where’s mummy? She is in the livingroom. She .............. a newspaper.

a. read                          b. reads                        c. is going to read       d. is reading

31. Last Sunday ........... her birthday. I ............ her a lot of flowers.

a. were – gave             b. was – gave              c. were – give              d. was - give

32. Now, It’s break time. They ................  volleyball ............ the schoolyard.

a. play – in                  b. are playing – on         c. are playing – in   d. play - on

33. My brother ...................  me next Monday.

a. visits                        b. visited                      c. is visiting                 d. is going to visit

34. He ................ A new bike last spring. Are you ........... it at the moment?

a. buy – see                 b. bought – seeing      c. bought – see            d. buy - seeing

35. What time ....... you sleep last night? I .......... at 8.00.

a. do – sleep                b. did – sleep              c. do – slept                 d. did - slept

36. I never go swimming but I .......... very much yesterday.

a. don’t swim              b. swam                        c. didn’t swim             d. am swimming

37. Mr Hung usually .............  to many interesting place in summer.

a. go                              b. went                         c. goes                          d. is going

38. I ......... back home .......... school very early last Friday.

a. come - to                 b. come - from            c. came - to                  d. came - from

39. She ...............   her teeth and ..........   her face every morning.

a. brushes – washes   b. brush – wash          c. brushs – washes     d. brushes - washs

40. I sometimes play hide-and-seek in the schoolyard........

a. last week                 b. next week                c. every day                 d. to day