Mark the letter A, B, C, or D to indicate the correct answer to each of the following sentences.

New sources of energy are constantly being looked for _______.

A. although fossil fuels continue to run out 

B. so that we continue to reduce fossil fuels 

C. as fossil fuels continue to run out 

D. fossil fuels continuing to run out

Mark the letter A, B, C or D on your answer sheet to indicate the underlined word or phrase in each sentence that needs correcting.

Having found guilty of racketeering, the mobster was sentenced to a number of years in prison.

A. Having found

B. of 

C. was sentenced

D. a number

George wouldn't have met Mary _______ to his brother's graduation party.

A. had he not gone 

B. hadn't he gone         

C. if he has not gone 

D. if he shouldn't have gone

I have told you not to do it _______.

A. hundreds of times

B. many hundred times 

C. hundred times 

D. a hundred times

Nét nổi bật trong giai đoạn thứ hai của cuộc chiến tranh là gì? Vì sao Mĩ tham gia chiến tranh muộn?