6. What is the new writer suggesting in the second paragraph?
a. Mouse can produce the cancer cell its brain.
b. Mouse is an example of one aging cell damage nearby cells.
c. Free radical and other molecules can develop cancer cells
d. free radical is bad for the brain cell in mouse's brain
e. DNA can be damaged by other cells
7. What is the main idea of the third paragraph
a. Rotten apple can be very bad fruit for skin cell
B.people call the aging skin cell "rotten apple"
C.skin cell are involved in repairing wounds and be able to maintain their ability to call the skin divide.
d. Skin cell can be used as "rotten apple" to help the neurons
e. Aging skin cell can damage the nearby cells.
8. What could be the suitable title for this passage
a. Rotten Apple is Bad for Cell
b. Brain Cell Can Be Damaged Easily
c. One Aging Cell Effect the Whole
d. The Differences Between Cells
e.skin Cell Better Than Brain Cell
9. According to passage, it can be inferred that
a. we should not eat rotten apple
b. the researchers already know why cell is aging
c.brain cell is very important for everybody
d.we should not let the brain cell aging
e. the researchers might find the way to cure brain disorder soon
10. Which of the following statements is true
a. An rotten apple is a cell in the body which is bad for you
b. The researchers find the new way to protect the aging cell in the brain.
c. The adult's brain cell can multiply.
d. One damaged cell can cause others damage too
e. Mouse has the strong brain's cells.
11. According to the passage, what does the word "rotten apple" refer to?
a. An apple which is very old and can't be eaten
b. The damaged cell which can cause damage to other cells
c. n apple which has a poison.
d. The skin cell which comes from rotten apple.
e. The skin cell which can be divided.
12. In line 15, the phrase "the finding" refers to which ofthe following definition?
a. Something that the people can find it
b. The rotten apple.
c. The result of the research.
d. The brain disorder.
e. The skin cells.
13. What does the phrase "brain disorders" in line 15 mean?
a. Brain cells can't divide themselves.
b. Brain doesn't listen to the order.
c. Brain can't understand the order.
d. Brain can't function completely.
e. Brain die and can't do anything