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【单选题】{{B}}Part ⅡCloze{{/B}}
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Read the following passage. For each numbered blank there are four choices markedA,B,
C、andD、Choose the best one and mark your answers onANSWER SHEET 1.
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Most people who travel long distance complain of jetlag. Jetlag makes business travelers less productive and more prone {{U}} (21) {{/U}}making mistakes. It is actually caused by {{U}} (22) {{/U}} of your "body clock" --a small cluster of brain cells that controls the timing of biological {{U}} (23) {{/U}}. The body clock is designed for a {{U}} (24) {{/U}}rhythm of daylight and darkness, so that it is thrown out of balance when it {{U}} (25) {{/U}} daylight and darkness at the "wrong" times in a new time zone. The {{U}} (26) {{/U}} of jetlag often persist for days {{U}} (27) {{/U}} the internal body clock slowly adjusts to the new time zone.
Now a new anti-jetlag system is {{U}} (28) {{/U}} that is based on proven {{U}} (29) {{/U}} pioneering scientific research.Dr, Martin Mooreede had {{U}} (30) {{/U}} a practical strategy to adjust the body clock much sooner to the new time zone {{U}} (31) {{/U}}controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates {{U}} (32) {{/U}} of the discomfort of jetlag.
A、successful time zone shift depends on knowing the exact times to either {{U}} (33) {{/U}} or avoid bright light.Exposure to light at the wrong time can actually make jetlag worse. The proper schedule {{U}} (34) {{/U}} light exposure depends a great deal on {{U}} (35) {{/U}} travel plans.
A．signs
B．defects

C、diseases
D．symptoms

网考网参考答案：D
网考网解析：
[解析] 本句意为：“因跨越时区而导致的不适症状通常会持续数天”。D项symptoms意为“症状”，最符合原文。首先，这种不适并不属于疾病的范畴，因此C项可以排除。 A项signs意为“标志，迹象，征兆”。例如：There are no signs of life about the house，这所房子没有住人的迹象。B项defects通常指事物“固有的、先天的缺陷”。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>

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