题目内容：

    Nine-year-old Patches the Dachshund was saved by a 3D-printed skull she received after the removal of an orange-sized tumor (肿瘤).

Patches had a small bump on her head for years. Her owner took her to see vets before ending up in the hands of Dr. Michelle Oblak.

Dr. Oblak had been researching 3D-printing uses for dogs. According to Oblak, a dog in Patches’ situation would need an expensive operation where the animal’s tumor and skull would be removed and then replaced. However, Oblak believed Patches was the ideal candidate to receive it.

Dymeck, Patches’ owner, said that she was hesitant (犹豫的), but the potential to help others convinced her. “They felt she could recover from this,” Dymeck said. “And to be part of research was a big thing for me – if they can learn something from animals to help humans, that’s important.”

The brand new method used to save Patches’ life started with a CT scan of her tumor. Then, Oblak and her team digitally removed the tumor in Patches’ skull. After that, they mapped out what the 3D-printed skull piece would look like and where it would fit on the dog. “There’s little room for error,” Oblak explained. “We’re talking less than two millimeters or else the plate wouldn’t fit.”

After everything was drawn out, Oblak sent the designs over to the 3D-printing company and just two weeks later Patches’ customized skull (定制的头骨) was ready. Then Patches went under the knife. After a four-hour operation, the dog was back to herself. Patches is now cancer-free. She has a scar on her head but it seems like a small price to pay for the life-saving operation.

“Our hope is this is something that could be more widely available on a broad scale,” Oblak said. “It went very well.”

1.What exactly is Patches?

A.A pet. B.A doctor.

C.A servant. D.A patient.

2.What was the problem with Patches?

A.She had a headache. B.Her skull was broken.

C.She suffered from a cancer. D.Her head was covered with scars.

3.Which word can best describe Dymeck？

A.Experienced. B.Responsible.

C.Unselfish. D.Talented.

4.What can we learn about the operation from the passage?

A.A small error happened. B.It cost Oblak a lot of money.

C.It was challenging and demanding. D.A CT scan mapped out the 3D skull piece.