2. A) They can make a person physically fit.

　　B) They can reduce a person’s blood pressure.

　　C) They can speed up metabolism.

　　D) They can slow down aging.

　　3. A) Wearing arms weights while you are swimming.

　　B) Jogging vigorously for a long time.

　　C) Cycling with special bicycles that require you to use both your arms and legs.

　　D) Walking slowly while swinging your arms back and forth.

　　Conversation 2

　　1. A) He needs a new pair of glasses when using a computer.

　　B) Staring at the computer screen for hours will not hurt eyes.

　　C) He should know how to use a computer skillfully.

　　D) He should know how to protect his eyes when using a computer.

　　2. A) It helps the eyes absorb eye drops.

　　B) It helps to keep the eyes moist.

　　C) It helps to maintain a person’s concentration.

　　D) It prevents a build-up of chemicals in the eyes.

　　3. A) Go to an eye doctor.

　　B) Improve his computer skills.

　　C) Take more breaks and rest his eyes.

　　D) Drink more coffee.

　　4. A) He has been working at his chemistry paper.

　　B) He doesn’t know how to use a computer.

　　C) He doesn’t want to write his chemistry paper.

　　D) He needs to get an office job.