Choose the best answer to complete each of the following sentences: 

Smoke from factories can cause air ________.

Several people have apparent tried to change the man’s mind, but he refuses to listen.

When actively hunting, a dolphin sends out transmitting about five signals every second.

 The British believe that meeting a black cat _________ a bad luck.

These letters ________ now. You can do the typing later.

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

Many international volunteer organisations are trying to find a ______ to the problem of world hunger.

Life expectancy has increased a great deal in spite of modern medicine and technology.

The workers are building a new bridge which is 150 meters in high.

Rudolph Nureyev has become one of the greatest dance the ballet world has ever known

The main advertising media includes direct mails, radio, TVs, magazines, and newspaper

Choose the best option to complete the sentences: What was _______ holiday you’ve ever had?

Ancient people made a clay pottery because they needed it for their survival.

Though he did not develop sign language, Laurent Clerc brought it on America from France.

In the beginning, radios cost much more than they do today because they turned out slowly and expensively by hand 

Choose the best answer:

The valley is so picturesque ___________ the refreshments are delicious.

The local economy which once used to be in crisis now depends to a great extent on menial jobs provided by the recent development of ecotourism.

There are none young single people living in this town – only old people and young families.

Tucked away in the mountains of Bolivia and Peru, Lake Titicaca are the highest navigable lake in the world.

Choose the best answer from the four options given (marked A, B, C, or D) to complete each sentence: 

The article was posted by Jim on Tuesday, __________?  

Choose one word or phrase marked A, B, C, or D that best complete the preceding sentence:

It was difficult to deliver the letter____________ the sender had written the wrong address on the envelop.

VOCABULARY AND STRUCTURES: Choose the best options 

Mr. Bao said, “I am so ________ of having been a Dien Bien Phu soldier.”