单选题
{{B}}Directions:{{/B}}
Read the following passage. For each numbered blank there are four choices marked A, B, C and D. Choices the best one and mark your answers on ANSWER SHEET 1.

Excitement, fatigue, and anxiety can all be detected from someone's blinks, according to psychologist John Stern {{U}}(21) {{/U}} Washington University in St. Louis. Stern specialized in the study on these tiny twitches, using them as sensitive {{U}}(22) {{/U}} of how the brain works. "I use blinks as a psychological measure to make{{U}} (23) {{/U}} about thinking because I have very little {{U}}(24) {{/U}} 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 mean?' you can't tell me {{U}}(25) {{/U}} you've started looking for the answer. But I can, by watching your eyes."
Blinks also tell Stern when you have understood his question--often long before he's finished asking it--and when you've found an answer or part of {{U}}(26) {{/U}}. "We blink at times {{U}}(27) {{/U}} are psychologically important." He says. "You have listened to a question, you understand it, {{U}}(28) {{/U}} you can take time out for a blink. Blinks are {{U}}(29) {{/U}} marks. Their timing is tied to what is going on in your {{U}}(30) {{/U}}."
Stern has found that {{U}}(31) {{/U}} suppress blinks when they are absorbing or anticipating {{U}}(32) {{/U}} but not when they're reciting it. People blink later, for example, {{U}}(33) {{/U}} they have to memorize six numbers instead of two. "You don't blink," he says, "until you have {{U}}(34) {{/U}} the information to some short-term memory store." And if subjects are cued {{U}}(35) {{/U}} the set of numbers is coming, say, five seconds, they'll curb their blinks until the task is {{U}}(36) {{/U}}. Similarly, the more important the information that people are taking in, the more likely they are to put their blinks on hold for {{U}}(37) {{/U}} Pilots blink less when they're {{U}}(38) {{/U}} for flying a plane than when they {{U}}(39) {{/U}} their eyes from the road to the rearview mirror. But if they see the flashing lights of a state trooper behind them, their {{U}}(40) {{/U}} will move fast to the speed-meter and back to the mirror.

【正确答案】 C

【答案解析】本题测试词义搭配。probe意为“探针，探测器”，指用于探查伤口或体腔的一种细长、可弯曲的外科医疗器械；research意为“调查，研究”，指学术性或科学的调查或探究；microscope意为“显微镜”，指常用来观察肉眼看不到的物体的仪器；pursuit意为“寻求，追求”。sensitive(灵敏的)修饰所填之词，根据后面的 how the brain works可知，应选C。