Choose the letter A, B, C, or D to indicate the underlined part that needs correction.

Global warming is caused by polluters such as carbon dioxide, methane and CFCs.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that has the underlined part pronounced differently from the others.

Mark the letter A, B, C or D on your answer sheet to choose the word whose underlined part is pronounced differently from the rest.

Mark the letter A, B, C or D on your answer sheet to choose the word whose underlined part is pronounced differently from the rest.

Choose the word whose stress is placed differently from that of the others.

Choose the word whose stress is put differently from that of the others.

Choose the best answer to complete the sentence.

I think most people will choose to ________ online classes in the next twenty years.

Choose the best answer to complete the sentence.

Nowadays, billions of devices are ______ to the Internet worldwide. It’s an amazing invention.