Identify the error in each sentence: By measuring the color of a star, astronomers can tell how hot is it

Identify the one underlined word A, B, C or D that must be changed for the sentence to be correct: 

John's wisdom teeth were troubling him, so he went to a dental surgeon to see about having them pull.

Identify the error in each sentence: 

Several (A) people have apparent (B) tried to change the man’s mind (C), but he refuses to listen (D).

After searching for evidence in the house, the police concluded that the thief must have come in through the window and stole the property while the family was asleep.

As our new furniture will deliver on Monday morning, I’ll have to stay at home to check that it was not damaged during transmit.

This book is not really ________. It is a waste of money buying it.

Why do we spend so much on things that give us tiny increases in comfort  of  ................ so many other people

Identify the error in each sentence: What happened in that city were a reaction from city worker, including firemen and policemen who had been laid off from their jobs

Pigeons, like many migratory birds, read the positions of the Sun and stars in order to orient them.

Books are still a cheap __________ to get knowledge and entertainment.

Please _________ and see us when you have time. You are always welcome 

Henry is fond of listening to ______ radio while John is interesting in watching _____ TV 

The Joshua tree is marked by their sword shaped leaves and greenish white flowers.

The Irish potato famine of 1845 and 1848 were some of the worst in that country’s history and led to thousands of deaths and mass emigration.

I can’t go out tonight as I______________ complete my assignments.

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. philosophy B. phenomenon C. optimism D. petroleum

Peter is working in an office. He’s a white ....... worker.

Identify the one underlined word A, B, C or D that must be changed for the sentence to be correct: 

Reading requires more lighting than many other activities; therefore, the possibility of comfortable reading greatly vary depending on available lighting and time of day.

The girl who were injured in the accident is now in hospital.

Although Kate saw no link between the two crimes, but she thought that there was only one murder.

The ozone layer must be protected because it shields the Earth from excessive ultraviolet radiations.