题目内容：

Getting stitched(缝合) up by Dr. Robot may one day be reality. Scientists have created a robotic system which did just that in living animals without a real doctor pulling the strings. Much like engineers are designing self-driving cars, the medical research is part of a move toward autonomous surgical robots, removing the surgeon’s hands from certain tasks that a machine might perform all by itself.

Doctors wouldn’t leave the bedside they’re supposed to watch. Plus they’d handle the rest of the surgery. In small tests using pigs, the robotic arm performed at least as well, and in some cases a bit better, as some competing surgeons in stitching together intestinal(肠的) tissue. “The purpose wasn’t to replace surgeons, ”said Dr. Kim who led the project. “If you have all intelligent tool that works with a surgeon, can it improve the outcome? That’s what we have done.”

If you’ve heard about machines like the popular Da Vinci system, you might think robots already are operating. Not really. Today many hospitals offer robot-assisted surgery where surgeons use the machinery as tools that they control by hand to operate through tiny openings in the body. But robot-assisted surgery has been controversial, as some studies have shown it can bring higher costs without better outcomes.

Kim’s team at Children’s Sheikh Zayed Institute invented the new STAR system—it stands for Smart Tissue Autonomous Robot—works sort of like a programmable sewing machine. They added sensors to help guide each stitch and tell how tightly to pull. But the approach wasn’t perfect. In the living animals, the robot took much longer and made a few stitching mistakes while the surgeon sewing by hand made none. Kim said the robot can be sped up. He hopes to begin human studies in two or three years.

1.What’s the best title for the text?

A. A new robotic system

B. A new-style way of stitching

C. The newly-designed driverless vehicles

D. Robot surgeons one step closer to reality

2.What will surgeons do when Dr. Robot is used in surgery?

A. They can help pull the strings.    B. They rest at the bedside.

C. They join in when necessary.    D. They perform another surgery.

3.Some people are against using robots in surgery probably because_________.

A. they can be out of control    B. they will take shorter time

C. they may be expensive to use    D. they are likely to cause great pain

4.What can we infer from the text?

A. Dr. Robot can take the place of surgeons.

B. Dr. Robot will be improved.

C. Dr. Robot has been tested with human trials.

D. Dr. Robot can free doctors’ hands in the operation.