Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
A study has been done to determine how the recent change in government policies ______ .
A.has affected the small business sector
B.the small business sector was affected
C.affecting the small business sector
D.have affected the small business sector

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
By the end of last year, the number of adult English speakers in Asia ________ 350 million.
A.would have reached
B.was reaching
C.had reached
D.were reaching

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Tony Blair is believed __________ for Liverpool last week.
A.to have left
B.to leave
C.leaving
D.having left

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
A human being is ________ of many, often conficting, desires.
A.created
B.consisted
C.made
D.made up

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
All the rings and necklaces _______ from the jeweler have now been recovered.
A.stealing
B.which stole
C.steal
D.stolen

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
When people need money badly, they may commit …………….
A.break
B.crime
C.shortage
D.disease

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Whereas many people have high living standards, a majority of the population still lives in…………
A.motels
B.basements
C.villages
D.slums

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Be careful with ……………. when visiting Paris. Crime rate there is quite high.
A.environment
B.vendors
C.policemen
D.robbers

Sơ đồ phản ứng nào sau đây dùng để sản xuất axit sunfuric trong công nghiệp?
A. $ Fe\to S{{O}_{2}}\to S{{O}_{3}}\to {{H}_{2}}S{{O}_{4}} $ .
B. $ FeO\to S{{O}_{2}}\to S{{O}_{3}}\to {{H}_{2}}S{{O}_{4}} $ .
C. $ N{{a}_{2}}S{{O}_{3}}\to S{{O}_{2}}\to S{{O}_{3}}\to {{H}_{2}}S{{O}_{4}} $ .
D. $ S\to S{{O}_{2}}\to S{{O}_{3}}\to {{H}_{2}}S{{O}_{4}} $ .

Để nhận biết 3 ống nghiệm chứa dung dịch HCl, dung dịch $ {{H}_{2}}S{{O}_{4}} $ và nước ta dùng
A.quỳ tím và dung dịch $ N{{a}_{2}}S{{O}_{4}} $ .
B.quỳ tím và dung dịch $ NaN{{O}_{3}} $ .
C.quỳ tím và dung dịch $ BaC{{l}_{2}} $ .
D.quỳ tím và dung dịch NaCl.