The passage mentions which of the following as a reason for the importance of Lake Vostok?
A.It may contain uncontaminated microbes
B.It can be studied using radio waves
C.It has already been contaminated.
D.It may have elevated levels of ultraviolet light.

A.singer
B.future
C.reply
D.answer

A.interesting
B.photocopy
C.difficult
D.effective

She denied having stolen his mother's money.
A.refused
B.admitted
C.insisted on
D.reminded

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Not until a few years ago_______ playing football .
A.did he start
B.he has started
C.he started
D.had he started

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Who will _______ your baby when you are at work?
A.take after
B.take on
C.take over
D.take care of

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
You were wrong _______ her for something she didn't do.
A.criticizing
B.so as to criticize
C.to criticize
D.that criticizing

Once the airline announced its ticket sale, the telephone in the main office would not stop ringing
A.People kept calling the airline main offíce since its announcemenl of ticket sale.
B.If the airline didn't announce a ticket sale, its telephone would stop ringing.
C.The airline telephone was ringing because they announced a ticket sale.
D.Nobody called the airline until it announced its ticket sale.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Those _______ boys often play tricks on their friends.
A.mischievous
B.obedient
C.honest
D.well-behaved

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
As we wanted to be close to_______nature, we moved to the countryside.
A.Ø
B.a
C.an
D.the