Question

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。选项中有两项为多余选项。注意：涂卡时，E涂AB，F涂AC，G涂AD。

Caner

Cancer is a disease that causes certain cells in the body to grow out of control. The human body contains billions of cells. Most of these cells reproduce themselves over and over. The body normally controls this process. In some people, however, certain cells start to multiply (繁殖) too much. These cells are not normal and can produce tumors (肿瘤).

Some tumors are harmless, but others are very serious. 1. ________ These destructive tumors are called cancer. Cells from these tumors sometimes spread to other parts of the body and form more tumors.

There are many different kinds of cancer. The kind of cancer a person has depends on where it starts to grow. 2.________

There are some general symptoms(症状) that may mean a person has cancer. These symptoms include pain, weight loss that cannot be explained, fever, tiredness, and changes in the skin. 3. ________

For example, a cough that will not go away could be a sign of lung cancer.

Scientists don’t know why some cells multiply too quickly. However, they have discovered many things that can lead to cancer. Most cancers are caused by conditions outside the body. 4. ________ People have a higher chance of getting some kinds of cancer if members of their families had them. A few viruses (病毒) also cause cancer.

The easiest way to prevent cancer is to stay away from the things that might cause it. 5. ________

Seeing a doctor once a year helps, too. Doctors can find early warning signs of cancer.

A. They can destroy nearby healthy cells.

B. Getting too much sunlight can cause skin cancer.

C. Each kind of cancer also produces specific symptoms.

D. It also depends on what causes it and how fast it grows.

E. Doctors suggest that people wear sunglasses when outdoors.

F. Eating unhealthy foods and not exercising enough can also lead to cancer.

G. Exercise and eating a lot of fruits and vegetables can also help to prevent cancer.

Answer 1