Ôn 9

The world is full of mystery. It seems entirely natural to us that there are teams of scientists in ______ universities and institutions around the world, attempting to discover the way the world works.

These men and women ______often worked alone, carrying out research into many different areas of science, and often received very little reward for their hard work.

They posed as IRS computer technicians. The experts were able to fool 35 of the managers. They gave both their passwords and IDs. In the hands of real hackers, this would have been a disaster!

What does the word “they” refer to in paragraph 4?   

The crust is the outer layer of the Earth. It is not a single piece of land. Instead, it is comprised of a number of plates. There are a few enormous plates and many smaller ones.

The word "it" in bold in paragraph 2 refers to _____.  

Mark A, B, C or D to indicate the word whose underlined part differs from the other in pronunciation in each questions.

Mark A, B, C or D to indicate the word whose underlined part differs from the other in pronunciation in each questions.

Mark A, B, C or D to indicate the word that differs from the other in the position of primary stress in each of questions.