Not until Kentucky’s Mammoth Cave had been completely explored in 1972 _________.

A. when was its full extent realized

B. the realization of its full extent

C. was its full extent realized

D. that its full extent was realized

The area was _______ by that storm, wasn’t it?

A. attacked

B. struck

C. beaten

D. infected

Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction.

The (A) people who they (B) hadn't seen the weather forecast were (C) caught unaware (D) by the hurricane.

A. The

B. they

C. were

D. unaware

That's no excuse! You know you ______ this report by today

A. can’t have finished

B. must have finished

C. may not have finished

D. should have finished

______ is not clear to researchers.

A. Why did dinosaurs become extinct

B. Why dinosaurs became extinct

C. Did dinosaurs become extinct

D. Dinosaurs became extinct

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

A. extracurricular

B. auditorium

C. recommendation

D. cooperation

John: ”Do you think that we should use public transportation to protect our environment?” - Laura: “________________.”

A. Of course not. You bet.

B. There is no doubt about it.

C. Well, that’s very surprising

D. Yes, it’s an absurd idea

We should participate in the movements _________ the natural environment.

A. organizing to conserve

B. organized to conserve

C. organized conserving

D. which organize to conserve

I don’t suppose there is anyone there, _________?

A. do I

B. isn't there

C. is there

D. don't I

Ann's encouraging words gave me ________ to undertake the demanding task once again.

A. a point

B. an incentive

C. a resolution

D. a target