Read the part of the interview with the scientist working in nanotechnology and fill in the gaps with the words and the phrases

Interviewer: Dear guests, welcome to our program "Future is now". Today in our studio we have professor Dickenson, who is engaged in working with such a magnificent [ ] of science — nanotechnology. Good evening, Mister Dickenson.

Scientist: Hello everyone! Nice to see you here. Today I will tell you about a new project that my lab is carrying out now. It's strongly connected with the [ ] of medicine.

Interviewer: So intriguing! We are ready to listen about all these [ ] ideas like limbs that were grown artificially or doctors reading minds of their patients with the help of some device…

Scientist: Oh, no, it's still not so utopian. We created a robot whose size is less than the size of a fly. A patient needs to swallow it as a pill, and it can help doctors to diagnose the illness. There will be no cuts or blood, so it is a [ ] method.

Interviewer: Sounds interesting. I haven't heard of such an [ ] of nanotechnology. But how on earth is it possible at all?

Scientist: This micro-robot is wirelessly connected with a screen on which the doctor can see all the changes and [ ] in the patient's organism.

Interviewer: But may I express a [ ]? Is it possible that the machine can make a mistake?

Scientist: Unfortunately, it is. There are hormones, minerals and cells in our body that can mislead the robot, so they are [ ]. Another limitation is that if the robot detects a cancerous [ ], it can only inform about it but no more than that.