Khi cho Cu tác dụng với dung dịch chứa H₂SO₄ loãng và NaNO₃, vai trò của NaNO₃ trong phản ứng là:

A. Chất xúc tác

B. Môi trường

C. Chất oxi hoá

D. Chất khử

Read the following passage and mark the letter A, B, C or D on your answer sheet to choose the word of phrase that best fits each of the numbered blanks from 5 to 9.

          As teenagers approach university level, a decision has to be made on what course to pursue. In this world of diversity, (1) ______ such a choice is not easy for both children and parents. In the old days, it was not much a problem to do the task because there were not so many diverse learning areas to choose from. Besides, there were only a few distinctive professional careers like doctor, engineer, accountant, nurse, teacher,etc.  to think about. Most higher learning usually led to a financially successful life. (2) ______, the cost of education was not so high. Today’s world is entirely different from the things (3) ______ have just been described.  The job market is constantly changing due to innovative technology and new (4) ______. Meanwhile, most teenagers have difficulty in identifying their own interests. There are a variety of well- organized career talks and student counseling workshop to guide and help teenagers (5) ______ what course to take. Furthermore, psychological tests are also used.  Certain instruments such as surveys, interviews and computer software can help to find out preferences, interests, or learning styles of the students.

Question 8:

A. competitively

B. competition

C. compete

D. competitive

Read the following passage and mark the letter A, B, C or D on your answer sheet to choose the word of phrase that best fits each of the numbered blanks from 5 to 9.

          As teenagers approach university level, a decision has to be made on what course to pursue. In this world of diversity, (1) ______ such a choice is not easy for both children and parents. In the old days, it was not much a problem to do the task because there were not so many diverse learning areas to choose from. Besides, there were only a few distinctive professional careers like doctor, engineer, accountant, nurse, teacher,etc.  to think about. Most higher learning usually led to a financially successful life. (2) ______, the cost of education was not so high. Today’s world is entirely different from the things (3) ______ have just been described.  The job market is constantly changing due to innovative technology and new (4) ______. Meanwhile, most teenagers have difficulty in identifying their own interests. There are a variety of well- organized career talks and student counseling workshop to guide and help teenagers (5) ______ what course to take. Furthermore, psychological tests are also used.  Certain instruments such as surveys, interviews and computer software can help to find out preferences, interests, or learning styles of the students.

Question 7:

A. when

B. that

C. where

D. what