Color is very important to most animals for it helps them to get along in the world. Color【B1】to make an animal difficult for its enemies to see. Many animals match their【B2】so well that as long as they do not move no one is【B3】to see them. You probably have often "jumped" a rabbit. If you【B4】, you know how the rabbit sits perfectly still【B5】you are just a few feet away. You【B6】see the rabbit till it runs for its【B7】matches very closely the place where it is【B8】Many times you may have walked past a rabbit【B9】didn"t run and you never knew it was there at all. One of the most usual color schemes that helps animals to keep【B10】being seen, is a dark back and light underpants, if an animal is the same color all over, there is always a dark shadow along the animal"s belly(腹部). Even if an enemy couldn"t see the animal he could see this dark shadow.
单选题 【B1】
【正确答案】 A
【答案解析】解析:helps是"帮忙,帮助",符合题意。Contributes是"贡献";tries是"试图";manages是"设法"。
单选题 【B2】
【正确答案】 B
【答案解析】解析:surroundings是"环境",符合题意,如:railway surroundings铁路周围环境。conditions是"条件"。enemies是"敌人"。
单选题 【B3】
【正确答案】 C
【答案解析】解析:本句可译为"只要他们不动,不可能看到他们"。 谓语不完整,缺少表语部分,A项可排除,B项hardly无法使意思成立。possible常用形式为It"s possible…。
单选题 【B4】
【正确答案】 D
【答案解析】解析:此处为省略句,根据前一句"You probably have often"jumped"a rabbit".完整的句子应为If you have often jumped a rabbit...A、B、C项均无法使句子正确。
单选题 【B5】
【正确答案】 D
【答案解析】解析:句子中缺少引导状语的连词,until意为"直到…之时",故而A、B、C项均不正确。
单选题 【B6】
【正确答案】 C
【答案解析】解析:seldom是:"很少,不常"有否定含义,题意相符。occasionally是"偶尔",A、B、D项三个频度副词,均无否定含义。
单选题 【B7】
【正确答案】 B
【答案解析】解析:coat是"覆盖物(动物的毛)"使句子意思完整,符合题意。surface是"表面";shape是:"形状";appearance是"面貌"均不符合题意。
单选题 【B8】
【正确答案】 A
【答案解析】解析:根据前句You know how the rabbits its perfectly still...可知A项正确;Matching是"匹配"。
单选题 【B9】
【正确答案】 B
【答案解析】解析:此处缺少定语从句的关系代词,只有that可指代无生命及有生命的东西。
单选题 【B10】
【正确答案】 C
【答案解析】解析:keep...from...有"免于"之意。