Fear is a biological process by which animals, including humans, secure the necessary energy to do a job that really matters.
举一反三
- Is it really necessary to __________ experiments on animals?
- We cannot do experients on animals for curing the humans' diseases.
- Is it really necessary to ______ experiments on animals? A: conceal B: conduct C: conclude D: condemn
- Which really matters is not what you said but what you did.
- It is the ability to do the job _______matters not where you come from or what you are. A: one B: that C: what D: it E: which F: /