The number of wildlife habitat reserves have been established in order to save endangered species from extinction.

A. thrown

B. mailed

C. posted

D. sent

A. numerous

B. sum

C. amount

D. great deal

A. It may contain uncontaminated microbes

B. It can be studied using radio waves

C. It has already been contaminated.

D. It may have elevated levels of ultraviolet light.

A. He earns an extremely high salary.

B. He lives at home with his parents.

C. He does not go out much.

D. He is not unemployed.

A. Having just passed your exam making your parents happy.

B. You have just passed your exam makes your parents happy.

C. That you have just passed your exam makes your parents happy.

D. You have just passed your exam which it makes your parents happy.

A. After you can completely avoid stress in your life, you need to find ways to cope with it.

B. As long as you can completely avoid stress in your lives, you need to find ways to cope with it.

C. As you cannot completely avoid stress in your life, you need to find ways to cope with it.

D. Because stress can completely be avoided in your life, you need to find ways to cope with it.

A. postures

B. expressions

C. thought

D. gestures