Chemical engineering is based in (A) the principles (B) of physics, chemistry (C), and mathematics (D).

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blank 31.

Nowadays a large number of young people spend much time_________the Internet.

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following question.

The film was really boring. It was _________ I’ve seen.

What is the main topic of this passage?

It was not until he failed the final examination _____ he realized how important the revision was.