She has just bought . (Miễn phí)

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

The discovery was a major _______ for research workers.

A. break-in

B. breakout

C. breakthrough

D. breakdown

Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction .

Each (A) of the nurses (B) report to the operating room when his or (C) her name is (D) called.

A. of the

B. report 

C. her name

D. called

Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction .

My father used to (A) give me a (B) good advice (C) whenever I had a (D) problem.

A. give 

B. good advice

C. whenever 

D. problem

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

Who was the last one ______the classroom yesterday?

A. to leave

B. left

C. leaving

D. had left

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

By 1820, there were over sixty steamboats on the Mississippi river, _______ were quite luxurious.

A. which of many

B. many of them 

C. many of which 

D. many of that

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

The bad weather caused serious damage to the crop. If only it _______ warmer.

A. was

B. were

C. has been

D. had been