Toluen + Cl₂ (askt) xảy ra phản ứng:

A. Cộng vào vòng benzen.

B. Thế vào vòng benzen, dễ dàng hơn

C. Thế ở nhánh, khó khăn hơn CH₄

D. Thế ở nhánh, dễ dàng hơn CH₄

Passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks from 11 to 20

      Everyone wants to reduce pollution. But the pollution problem is (11) ________ complicated as it is serious . It is complited (12) ________ much pollution is caused by things that benefit people. (13) ________, exhaust from automobiles causes a lartge percentage of air pollution . But the automobile (14) ________ transportation for millions of people . Factories discharge much (15)_____ the material that pollutes theair and water, but factories give employment to a large munber of people . Thus , to end (16)________ greatly reduce pollution immediately , people would have to ( 17)________ using many things that benefit them . Most of the people do not want to do that , of course . But pollution can be (18)________ reduced in several ways . Scientists and engineers can work to find ways lessen the (19)________. Of the pollution that such things as automobiles and factories cause . Governments can pass and enforce laws that (20) ________ businesses and traffic to stop , or to cut down on certain polluting activities.

Điền vào số (14)

A. provides 

B. takes       

C. carries     

D. afford

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

A. provide

B. private

C. advise

D. arrang