[单项选择]Excitement, fatigue, and anxiety can all be detected from someone’s blinks, according to psychologist John Stem (62) Washington University in St. Louis. Stem specialized in the study on these tiny twitches, using them as sensitive (63) of how the brain works. "I use blinks as a psychological measure to make (64) about thinking because I have very little (65) in what you tell me about what you are thinking." He says. "If I ask you the question, ’what does the phrase a rolling stone gathers no moss (苔藓) mean ’ You can’t tell me (66) you’ve started looking for the answer. But I can, by watching your eyes.
Blinks also tell Stem when you have understood his question -- often long before he’s finished asking it and when you’ve found an answer or part of (67) "We blink at times (68) are psychologically important." He says. "You have listened to a question, you understand it, (69) you can take t
A. question
B. inclination
C. doubt
D. faith