Đổi \(0,6 m = 6 dm\)

Vì mỗi dm của khối kim loại nặng 12 kg, nên khối kim loại dài 6 dm sẽ nặng:

\(6 . 12 = 72 kg\)

a) S_xq bể cá:

\((80 + 50) . 2 . 45 = 11700 (cm²)\)

S đáy bể cá:

\(80 . 50 = 4000 (cm²)\)

S kính dùng làm bể cá:

\(11700 + 4000 = 15700 (cm²)\)

b)  V hòn đá:

\(80 . 50 . 3,5 = 14000 (cm³)\)

1.on

Note: "Get on" : lên xe 

2.down

Note: "Close down": đóng cửa, ngừng hoạt động

Trong câu là tạm thời để sửa chữa.

3. to

Note: "Face up to" : đối mặt với, giải quyết vấn đề.

4.down

Note: "Turn down" : từ chối một lời đề nghị.

5.from

Note: "Coming from" : nguồn gốc xuất xứ.

6.with

Note:  "Deal with" : giải quyết, xử lý, đối phó với.

7.up

Note: "Get up" : thức dậy

8. off

Note: "Call off": hủy bỏ.

9. forward

Note: "Look forward to" : mong đợi, háo hức.

10.down

Note: "Pass down" : truyền lại

a)Đổi 6dm = 0,6m

4dm = 0,4m.

S_xq bể cá là: (1,3 + 0,9) . 2 . 0,6 = 2,64 (m²)

S đáy bể cá là: 1,3 . 0,9 = 1,17 (m²)

S kính dùng để làm bể cá là: 2,64 + 1,17 = 3,81 (m²)

b) Đổi 5dm = 0,5m.

Chiều cao mực nước dâng lên là: 0,5 - 0,4 = 0,1 (m)

V hòn đá là: 1,3 . 0,9 . 0,1 = 0,117 (m³)

42D

43D

44A

45C

46A

47D

48D

49D

50A

51A

52B

60.C

61D

62A

63B

64B

65C

66A

67C

Sydney (1) ……….  one of the world's greatest cities. It is the cultural and financial heart of Australia. It is (2) ………. for Sydney Opera House. It is located on Bennelong Point (3) ………. Sydney Harbor. The opera house was completed in 1973 after 16 years of construction. A Danish architect named Journo Utzon (4) ……….  the landmark. It was a very (5) ……….  to create the building. The top of the opera house looks like sails from a boat or large shells.

1.A. am                                 B. is                             C. are               D. be

2.A. well-known                   B. good-known           C. well-know  D. good-know

3.A. on                                  B. at                            C. in                D. of

4.A. design                           B. designing                C. designed     D. designs

5. A. expensive                     B. wonderful               C. talkative      D. intelligent

I. Choose the word whose bold part is pronounced differently from others. Write A, B, C or D in the blank.

      A. round                         B. shoulder                           C. mouth                              D. house

2.   A. moutain                     B. mouse                              C. round                               D. cousin

3.   A. town                          B. crowded                          C. snow                                D. tower

4.   A. they                           B. thank                               C. there                                D. those

5.   A. than                           B. their                                 C. mouth                              D. then

6. A. local                             B. tower                               C. flower                             D. around

7. A. worked                           B. stopped                   C. forced                     D. wanted

8. A. new                                B. sew                         C. few             D. nephew

9. A. sun                                  B. sure                         C. success                    D. sort

10. A. keep                              B. cheer                       C. meet                        D. week