Choose the best answer.

Tourists ..............most of the sights of London by a guide.

Mercury is not often visible because it is so near the sun to be seen.

The signing of the peaceful treaty was an event of major importance.

It is difficult .............English in some weeks.

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

It was only then_________ how much I owed to her.

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

I regret_____________ that your application has been unsuccessful.

Because helicopters are capable of hovering in midair, they are particularly useful for rescue missions, military operates , and transportation.

Choose the best answer among the A, B, C, or D provided to finish each of the incomplete sentences below:

Peter has been working for 10 hours. He___________ be very tired now.

As a young man, Darwin showed little promising as a biologist .

Completes each sentence by circling the letter (A, B, C, or D).

A person who studies language is a..................

Last night, when I was reading, I heard the door to open and saw the shadow move across the floor.

Choose the correct answer to fill in the blank. 

He has been________ to supporting his nephews.

Choose the best answer among the A, B, C, or D provided to finish each of the incomplete sentences below:

Most children find it interesting ____________ a foreign language.

Choose the best answer among the A, B, C, or D provided to finish each of the incomplete sentences below:

It is necessary to learn a foreign__________ .

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

Hardly had he left home_________ the telephone rang.

Choose the best answer.

Newton developed the theory of............

One inventor that Thomas Edison can take credit for is the light bulb

Choose the best answer:

A ____________ is a short funny film with drawn characters.

If the Oxygen supply in the atmosphere was not replenished by plants, it would soon be exhausted.

 I wish I were taller.                                  

Million of people lost their jobs in the 90’s. This, in turn, caused social dissatisfaction with the political leaders who had promised jobs and prosperity