Exercise 4: Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions
2.How many were there in all?
A.compete B. competitions C. competitive D. competitors
3.We won't buy the car until the arises.
A.necessary B. necessity C. necessarily D. unnecessary
4.waste is one of the causes of air pollution.
A.Industrious B. Industrial C. industry D. industrialization
5.Mount Vesurius is an volcano.
A.act B. active C. action D. activity
6.He is confident enough to express his opinion
A.comfortable B. comfort C. comfortably D. uncomfortable
7.She is so busy with activities that she has no time for entertainment.
A.society B. social C. sociable D. socialization
8.One day, young Faraday attended a lecture given by a scientist, Sir Humphry Davy.
A.famous B. fame C. famously D. infamous
9.He has been very interested in doing research on since he was at high school.
A.Biology B. biological C. biologist D. biologically
10.You are old enough to take for what you have done.
A.responsible B. responsibility C. responsibly D. irresponsible
