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单选题公共英语三级

2018-02-01

第（44）题选

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参考答案

B

答案解析

上一句讲到这种甘蔗还不能大量出售，但一旦能够出售，将会产生难以置信的利润；下一句说到“巴西出产世界食糖的四分之一。它已经在位于圣保罗的坎皮纳斯大学的保罗•阿鲁多教授的负责下，发起一项国际合作项目”。由此可知，空格处应是讲这种甘蔗的现状和优势，科学家才研究它的基因，选项B与上下文联系最紧密，故选B。

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Walking, if you do it vigorously enough, is the overall best exercise for regular physical activ-ity. It requires no equipment, everyone knows how to do it and it carries the（46）risk of in-jury. The human body is designed to walk. You can walk in parks or along a river or in your neighborhood. To get（47）benefit from walking, aim for 45 minutes a day, an average of five days a week.
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A．allowing
B．avoidable
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