Each of the following sentences has an error. Find the errors and correct them. 

It is important that the mechanic takes steps to repair our air conditioner.

Choose the best answer to each question. 

To a large extent, slavery was ________ during the past century.

 Our energy will soon come to an end if we don't__________ it.

Jane will be admitted to the university _______________ she has bad grades

Choose the best answer: 
She tried to remain cheerful _______ she had failed the test.

Choose the best answer to fill in the blank:

 Please turn __________ the gas. I want to cook my lunch.

Each of the following sentences has an error. Find the errors and correct them.

He was one of the first inventor to apply the principles to the process of invention.

If you _______Joanna, ask her to come and see me

The children like to put _______________ nice clothes when they go out.

Choose the best answer to each question. 

A military junta has taken over power in the country after the democratic administration _________.

Do you happen to know the name of the _____?

Choose the best answer to each question. 

Mary attempted to ________herself with her new boss by volunteering to take on extra work.

Choose the best answer to each question. 

_________is more interested in rhythm than in melody is apparent from his compositions.

Choose the best answer to each question. 

The ________ of houses has increased dramatically in recent years.

Each of the following sentences has an error. Find the errors and correct them.

A paragraph is a portion of a text consists of one or more sentences related to the same idea.

Choose the best one (A, B, C, or D) to complete the sentence.

Her new boss is so bad that he does never take _______ of her extra hours of work, that’s why she needs to change her job now.

Choose the best options to complete the following sentences.

Angkor Watt should really be known __________ a wonder of the world.

_______________ his physical handicap, he has become a successful businessman.

Choose the best answer to each question. 

 ________ scientists have observed increased pollution in the water supply.

Let's go somewhere for a drink________

There's nothing good on TV. Why don't you turn it _________?