Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.You should turn off the lights before going out to save _____.
A.electricity
B.electrify
C.electric
D.electrically

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.______ school fees may discourage many students from attending university.
A.Gaining
B.Receiving
C.Improving
D.Raising

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.Drinking too much alcohol is said to ________ harm to our health.
A.make
B.do
C.lead
D.take

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.At the end of the training course, each participant was presented with a ________ of completion.
A.degree
B.certificate
C.diploma
D.qualification

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.The __________ high levels of pollution in the coastal areas are a matter of great concern to the government.
A.redundantly
B.intensively
C.marginally
D.excessively

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.Solar energy is not widely used _______ it is friendly to the environment.
A.since
B.although
C.in spite of
D.because of

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.The sign warns people ________ the dangers of swimming in this river.
A.about
B.from
C.with
D.to

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.__________, they were surprised to find their favourite band playing there.
A.On arrival at the party
B.To have attended the party
C.They had arrived at the party
D.Just attended the party

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.Once ________ in large quantities, these products will be more affordably priced.
A.are produced
B.having produced
C.produced
D.producing

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.Jane would never forget ________ first prize in such a prestigious competition.
A.to be awarded
B.being awarded
C.to have awarded
D.having awarded