Trong đoạn mạch mắc nối tiếp, công thức nào sau đây là sai? *

A U = U1 + U2 + ... + Un.

B I = I1 = I2 = ... = In.

C R = R1 = R2 = ... = Rn.

D R = R1 + R2 + ... + Rn.

Đặt một hiệu điện thế UAB vào hai đầu đoạn mạch gồm hai điện trở R1 và R2 mắc nối tiếp. Hiệu điện thế giữa hai đầu mỗi điện trở tương ứng là U1, U2. Hệ thức nào sau đây là không đúng? *

A.UAB = U1 + U2

B.IAB = I1 = I2

C.RAB = R1 + R2

D.U1/U2 = R2/R1

Một đoạn mạch gồm hai điện trở R1 = 6 Ω , R2 = 3 Ω mắc song song với nhau vào hai điểm có hiệu điện thế 6V. Điện trở tương đương và cường độ dòng điện qua mạch chính là: *

A.R = 2 Ω, I = 1A

B.R = 9 Ω, I = 0,6A

C.R = 9 Ω, I = 1A

D.R = 2 Ω, I = 3A

Chất nào dưới đây tác dụng được với acid: Ag, ZnO, CO2, HCl ?

Cho các oxide sau: CaO, CuO, Al2O3, MgO. Hỏi oxide nào tác dụng với nước tạo thành dung dịch base ?

1) The _____________ language in Vietnam is Vietnamese.

       A. nationally                  B. nation                        C. national                     D. nationality

2) Almost all the tourists are really _____________ by the beauty of Ha Long Bay.

       A. excited                     B. impressed                   C. interested                  D. fond

3) Islam is the country‘s official _________ in Malaysia.

       A. language                   B. education                   C. religion                      D. impressing

4) It’s very kind ________ her to help me with this work.

       A. of                              B. to                                 C. in                           D. at

5) Wearing uniforms helps students feel _________in many ways.

       A. economic                  B. equal                         C. unfashionable           D. logical

6) Jacob Davis and Levi Strauss __________ the first jeans in 1923.

       A. make                        B. made                          C. were made                D. have made

7) The plan was designed to help Vietnam’s ethnic _____________on education..

       A. cities                         B. clothes                      C. symbols                    D. minorities

8) Don’t ____________on the others, Do it by yourself.

A. depend                             B. compel                      C. divide                        D. modernize

9) Primary education is free and __________for all children between six and eleven in Vietnam.

A. easy                                 B. compulsory               C. dependent.                D. traditional

10) I wish I could visit your village again some day, Ba.

A. Too true!                                                                C. Yes, let’s!

Read the passage and decide whether each of the following statements is True or False.

Friendship is more ambiguous than we might think. What makes someone a good friend? A good friend is someone who you feel positive around, someone you connect with on a deep and natural level, and someone who cares for you unconditionally. A friend should give off positive vibrations when you are together, and should be a positive influence on your life, and not someone who you feel takes away your happiness when you are around him or her. This influence often extends into many areas of your life, so that you are enriched with the friendship at many angles. Finding a deep and natural connection with someone is easier said than done. You might search your whole life for that special someone who you can connect with you on such a level. This connection is so unique that it is often described as if you have met them before in a previous life, or that you instantly understand each other, even on the first meeting. This connection is generally what keeps friends together for years and what allows them to understand each other at a greater depth than most people.

Note : ambiguous (a): not easily understand, not clearly            *Rare (a): unusual, not done or seen very often

25. A good friend is one that share good feelings with you.                                                ______

26. It is easy to find a deep connection between two people.                                              ______

27. The connection is so rare that it’s described by the phrase “a previous life”.                 ______

28. The unique connection is doesn’t friends gain understanding of each other.                 ______

13. Nowadays many Vietnamese women wear modern clothes at work for __________.   (convenient)

14. We should spend our money __________.                                                                     (economical)   

15. The writer took much __________ from the children he taught.                                   (inspire)

16. After retiring, he remained active in __________ programs at the laboratory.              (education)

17. The flood victims need shelter and warm ___________                                                (cloth)

18. NGUYEN DU is considered one of the most famous Vietnamese ___________         (poem)

1.      They correspond __________ least twelve times a week. They are close friends.

A.    at                                       B. in                                        C. with                              D. up

2.      The company’s managers are planning to organize a farewell ________  for Mike before he leaves next Monday.

A.    celebration                         B. anniversary                         C. festival                          D. party

3.      The neighbor’s daughter ___________  to school when she was small. Now, she rides a bike.

A.    walked                              B. was walking                       C. used to walk                 D. used to walking

4.      My boss wishes she _______  France someday.

A.    visited                               B. had visited                          C. visits                             D. could visit

5.      He ________  to his family everyday from 2008 to 2014.

A.    has written                        B. writes                                  C. wrote                            D. written

6.      Liz _____________ to show the trip to her parents.

A. painted pictures                B. took photos                        C. wrote letters                 D. bought postcards

7.      He got up late, __________ he missed the first class.

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

8.      I’ll be at home ________ Friday morning.

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

9.      Foreign tourists who do not wear suitably should not enter the place of __________.  

A. situation                             B. worship                               C. atmosphere                   D. tropic