阅读下列短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。

Within the next 80 years, our lives may be changed a lot by 3D printing. It has already （1） many things in our lives, right down to the food we eat. For example, some （2） in London have served 3D-printed hamburgers to customers.

But perhaps the biggest success that people have achieved is in medicine. It is （3） when people see a beating heart printed with 3D printing technology. The printed body part might help people live a normal life again （4） an illness or an accident. And it is not just humans who are （5） —in Brazil, people have built new 3D-printed body parts for animals injured in a forest fire!

（1）

A．

wasted

B．

tested

C．

influenced

D．

separated

（2）

A．

restaurants

B．

offices

C．

libraries

D．

hospitals

（3）

A．

tiring

B．

relaxing

C．

amazing

D．

disappointing

（4）

A．

before

B．

after

C．

until

D．

through

（5）

A．

training

B．

arguing

C．

fighting

D．

benefiting