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.

It is complicated because pollution is caused by things when benefit people.

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

“Would you like to have dinner with me?” – “______________.”

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

It is not always easy to make a good ______ at the last minute.

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

A survey was _____ to study the effects of smoking on young adults.

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

Mr.Brown has kindly agreed to spare us some of his _____ time to answer our questions.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

A waitress served us. She was very impolite and impatient.

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

Do you know the boy ______ at the party last week?

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

The _____________ friendly products are designed not to harm the natural environment.