Mark the letter A, B, c or D on your ansyver sheet to indicate the correct answer which completes each of the following sentences
________ Not until Kentucky’s Mammoth Cave had been completely explored in 1972

A. when was its full extent realized

B. was its full extent realized

C. that its fiill extent was realized

D. the realization of its full extent

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 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

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The economy of Maine is based to a great extent in its forest, which over 80 percent of its surface area.

A. economy of

B. to a

C. in its

D. percent of

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The economy of Maine is based to a great extent in its forest, which over 80 percent of its surface area.

A. economy of     

B. to a         

C. in its       

D. percent of

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The (A) economy of this country is based (B) to a great extent (C) in its forests, which cover 80 (D) percent of its surface area.

A. economy 

B. to 

C. in its 

D. percent of

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

The Federal Trade Commission, establishing in 1914, steadily increased the extent and nature of its regulation of the advertising industry.

A. advertising   

B. nature     

C. establishing      

D. Steadily increased

Read the text and choose the correct answer for each question below: 

Ha Long Bay

Ha Long Bay is a group of offshore islands that is the best example of marine invaded limestone region in the world.  The Bay holds over 1,600 islands and islets. There are caves and grottoes, with stalactites and stalagmites. Its limestone pillars are a unique natural feature of great scenic beauty and biological interest. The great extent and the richness of its forms set it apart from many other sites.

Ha Long Bay is an extremely popular destination both for foreigners and Vietnamese: already in the early 1990s it saw over 1 million visitors a year. It is unlikely that the number has decreased over the years - so there will always be about 3,000 other people in the Bay at the same time as you!

The natural beauty of the Bay lay hidden today under a very common fog. As I had already seen the similar karst landscape in China a couple of years before, I certainly said that I was blown away by the beauty of Ha Long Bay. We went onto one of the islands to visit the Surprising Cave - an indeed surprisingly big and beautiful cave with three hollow chambers. We saw some monkeys here too, just outside the cave exit.

Part of the tour was half an hour of kayaking - enough to paddle a full circle around the main area. The views from the kayak I found much more impressive than from the larger boat: you're so tiny then and the peaks rise sharply in front of you. I had a better look at the water too, and cannot say that I saw pollution by plastic or other junk floating around.  There is a thin layer of oil on the water in some parts though.

And then it's time to get back in the bus to Ha Noi, another 3.5 hours. The tour was carried out well with good seafood for lunch and I had a satisfying day.

 Question: The writer was _______.

A. able to escape from an explosion in Ha Long Bay

B. very impressed by the beauty of Ha Long Bay

C. unable to see Ha Long Bay due to the fog

D. really frightened of visiting the Surprising Cave

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions

It was not until after I got home that I realized that I had not set the burglar alarm in the office.

A. Fortunately, I realized that I hadn’t set the burglar alarm just before I left for home; otherwise, I would have had to travel all the way back to the office.

B. On the way home, I suddenly realized that I had forgotten to turn on the burglar alarm in the office.

C. I didn’t turn the burglar alarm on before I left the office, but I only became aware of this after I’d arrived home.

D. I wish I had realized before I arrived home that I hadn’t turned on the burglar alarm in the office, then it would have been easier to go and set it.