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 |