72. The teacher said: “This homework ……… carefully”

A. has to do​B. has to be done​C. had to do ​D. had to be done

73. _______ he wasn’t invited, he went to the party.

​A. Although​B. Because​C. So​D. As

74. She never let you cook the meals, ………?

A. didn’t she ​B. doesn’t she ​C. did she​D. was she

75. ……… people go to soccer matches now than twenty years ago.

A. Less ​B. Lesser ​C. Fewer​D. Few

76. My father asked us_________too much time playing computer games.

A. not to spending​B. did not spend​C. not to spend​D. to not spent

77. My mother has just bought a house ……… is full of roses.

A. whose garden​B. the garden​C. the garden of it​D. the garden whose

78.Energy-saving bulbs should be use …, new furniture costs too much electricity

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

79. If you explained it to him more slowly, he ……………….. it.

​A. understands​B. would understand​C. understood​ D. will

80. I live in Dalat, ………is one of the most beautiful cities of Vietnam.

​A. in which​B. that​C. which​D. where

81. Neither the students nor the teacher ………come.

​A. has​B have​C. is ​D. are

82. On the way to the town, they stop ………a rest.

​A. taking​B. to take​C. to have​D. having

83. It costs about fifty dollars to have a tooth ……….

​A. filling​B. to fill​C. filled​D. being filled

84.I prefer ………………… whenever I have free time.

A. watching TV to listening to music​B. watch TV to listen to music

C. to watch TV than listening to music ​D. watching TV to listen to music

85.It is high time we ………………… our house. It looks very old.

A. repaint​B. to repaint​C. repainting​D. repainted

86. I usually spend two hours ………………… English with my friends.

A. practicing​B. to practice​C. practices​ D. practices

n NaOH = 50 / 40 = 1,25 mol

n HCl = 36,5 / 36,5 = 1 mol

PTHH: NaOH+HCl -> NaCl+H₂O

Trước p/ứ: 1,25 mol. 1 mol

Trong p/ứ: 1 mol. 1 mol

Sau p/ứ: 0,25 mol. 0 mol

Sau p/ứ NaOH dư 0,25 mol, HCl p/ứ hết

=> n NaCl = n HCl = 1mol

m NaCl = 1* 58,5= 59,5g

72. The teacher said: “This homework ……… carefully”

A. has to do​B. has to be done​C. had to do ​D. had to be done

73. _______ he wasn’t invited, he went to the party.

​A. Although​B. Because​C. So​D. As

74. She never let you cook the meals, ………?

A. didn’t she ​B. doesn’t she ​C. did she​D. was she

75. ……… people go to soccer matches now than twenty years ago.

A. Less ​B. Lesser ​C. Fewer​D. Few

76. My father asked us_________too much time playing computer games.

A. not to spending​B. did not spend​C. not to spend​D. to not spent

77. My mother has just bought a house ……… is full of roses.

A. whose garden​B. the garden​C. the garden of it​D. the garden whose

78.Energy-saving bulbs should be use …, new furniture costs too much electricity

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

79. If you explained it to him more slowly, he ……………….. it.

​A. understands​B. would understand​C. understood​ D. will

80. I live in Dalat, ………is one of the most beautiful cities of Vietnam.

​A. in which​B. that​C. which​D. where

81. Neither the students nor the teacher ………come.

​A. has​B have​C. is ​D. are

82. On the way to the town, they stop ………a rest.

​A. taking​B. to take​C. to have​D. having

83. It costs about fifty dollars to have a tooth ……….

​A. filling​B. to fill​C. filled​D. being filled

84.I prefer ………………… whenever I have free time.

A. watching TV to listening to music​B. watch TV to listen to music

C. to watch TV than listening to music ​D. watching TV to listen to music

85.It is high time we ………………… our house. It looks very old.

A. repaint​B. to repaint​C. repainting​D. repainted

86. I usually spend two hours ………………… English with my friends.

A. practicing​B. to practice​C. practices​ D. practices

a) PTHH:

CO₂+Ba(OH)₂ -> BaCO₃ + H₂O

b). nCO₂ =6,72 /22,4= 0,3 mol

Theo PTHH, ta có nCO₂=nBa(OH)₂ = 0,3 mol

Đổi 600ml = 0,6 l

CM Ba(OH)₂= 0,3 / 0,6 = 0,5 M

c) Theo PTHH, ta có

nCO₂ = nBaCO₃= 0,3 mol

m BaCO₃ = 0,3* 197= 59,1 g

He went to the office ……………… check the progress of the work.

57. She asked me ………………….. to another country in the

region.

58. There ............................ no rain here since last month.

A. is ​B. has been​C. was​ D. had

66. Lan was very __________________ after she watched a cartoon

A. excite B. excited ​C. exciting ​D. excitement

67. There are many _____________________ throughout the year.

A. celebrate ​B. celebrating ​C. celebration ​D. celebrations

74. Lan and Maryam are pen pals. They …… each other twice a month.

A. writing ​B. write​ C. has written ​D. wrote

75. Lan enjoyed the peaceful atmosphere ……… Maryam was praying.

A. when ​B. during ​C. while ​D. where

79. There are too………water here. we needn’t buy more.

A. enough​B. much​C. many​D. some

83. Tet is a festival………… occurs in late January or early February.

A. whom​B. when​C. where​D. which

A. in ​B. on ​ C. of ​ D. to

A. at​B. on​C. with​D. for

A. down​B. up​C. on​D. off

91. It was _________ wonderful music that I went straight out and bought the record.

A. so ​B. very ​C. too ​ D. such

92. He wrote them three letters _________ he didn’t get a reply.

A. so ​B. and ​C. but ​ D. that

Mark the letter A, B, C or D to indicate the word(s) CLOSET in meaning to the underlined word(s) in each of the following questions.

79. Acupuncture originated in China and has been used as a traditional medicine for thousands of years.

A. began​B. created ​C. developed ​D. introduced

80.What benefits does TV bring about to people's life?

A. events ​B. shows ​C. advantages​D. programs

81. For most North American households, lighting accounts for10 percent to percent of the electricity bill.

A. makes up​B. makes for C. makes off ​D. makes out

82. They visited Ho Chi Minh’s Mausoleum.

A. an impressive tomb​C. a big coffin

B. a large building​D. an area for recreation

83. Is military service compulsory in your country?

a. may be chosen or not​c. give support

b. must be done​d. not requiring a payment

84. Button decided to continue with his studies for another two years.

a. get on b. go onc. carry out d. turn off

85. He’s always shown an understanding of what consumerswant.

a. people who buy something from a shopb. people who steal something from a shop

c. people who doesn’t believe in God d. people who is not brave

86. The UFO stayed in the sky for about thirty seconds, and then it went away

a. disappearedb. appeared c. flew d. traveled

87. The necklace is interesting but not precious.

a. invaluable ​c. worth a lot of money

b. very valuable​d. b and c are correct

21. Harrods, in London, is probably one of the best-known ........................ in the world.

A. departmental stores​B. department shops​

C. department stores​D. stores department

22. For most households, lighting........ for 10 percent to 15 percent of the electricity bill.

23. I’ll go to the town tomorrow, and_________ .

24. Would you mind if I _________ a friend to the party?

25. Malaysia is divided ……… 2 regions

A. to B. on C. in D. Into

26. It's very crowded here. I wish ..................

A. there were a few people​B. there is no one

C. there weren't so many people​D. there was somebody here

27. Don’t waste your breath________ with him.

28. You were not listening in class, ?

29. Mike was not feeling well ,so we gave him ……….. work to do than you.

30. I don’t see any.… in arriving early at the theater if the snow doesn’t start until 9 o’clock

31. The taxi drivers are complaining that their fares are too……………. .

A. small B. little ​C. lowD. few

32. It’s very crowded here. I wish ………………

a. there were a few people ​b. there is no one​

c. there weren’t so many people​d. there was somebody here

33. Family members who live apart try to be together at Tet.

​a. beside ​b. near ​c. awayd. close

34. I hope the children soon got used_______ in much smaller house.

35. “What’s Mai doing?” “ I’m not sure. She ………….. her homework.”

36. We consider him ................

A. our father B. is our father C. be our father D. to be our father

37. I don't like the place .................... he lives.

A. that B. which C. where D. what

38. It took us quite a long time to get here. It was …………. journey.

39. I asked two people the way to the station but ………….. of them knew.

40. We suggest that all receipts_________ to the committee for approval

A. have to submit B. submitted ​C. be submitted​D. submit

41.Those shirts need_____________, but you don't need_________them now.

A. ironing/iron B. to be ironed/iron C. to iron/ironing D. ironing/to iron

42.My best friend has a great ________and everyone likes her.

43. There was ______ traffic that we were an hour late.

A. so much​B. so few ​C. so many ​D. so little

44. Math and English are _____ for all students, but art and music are optional.

A. national ​B.compulsory C. official ​D. traditional