Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.

Over the next 20 to 50 years, it will become harder to tell the (31) _____ between the human and the machine. All, body parts will be replaceable. Computers will function like the human brain          with the ability to recognize feelings and respond in a feeling way. They will then produce fake people. We will then be able to create a machine duplicate of ourselves so we will appear to be alive long after we are dead. Maybe a few decades later, a way will be found to transfer our spirit, including our (32) _____ and thoughts, to the new body. Then we can choose to live for as long as we want. It might be expensive. When it becomes possible to do a spirit transfer, they will figure out (33) _____ to do them automatically. So we will be able to reside within whichever duplicate we want, whenever we want.

Miniature robots will be built to travel through your blood stream and repair damage. Also, larger robots will be used when you are sick. When you have an upset stomach, you will (34) _____ a very small cherry tasting robot which will travel through your stomach taking video of the mess. It will be set up like a video game, so you can control the exploring and the selection of images. Then you can replay the video to help a doctor (35) _____ your illness, or to prove to your employer that you really, were sick.

Điền ô số 31