E．Generally, there are two types of formal walking as exercise.

　　F．Walk slowly for the first five minutes to warm up your muscles.

　　G．Avoid the use of vehicles whenever possible and choose to walk.

　　【文章大意】　本文为说明文，题材为健康类。本文主要介绍步行的好处和方法。

　　1．解析：E　根据下句They are race walking and power walking可推断，此处介绍两种步行方法。

　　2．解析：F　该段在介绍步行前的准备工作，再结合空后的句子可判断此处意为先慢后快。

　　3．解析：C　根据本段内容可知，该段旨在介绍步行的技巧。

　　4．解析：A　根据空后句子可知，此处在介绍步行对身体的好处。

　　5．解析：B　根据空前的In addition, walking is also beneficial for mental health可知，此处在举例说明步行对心理健康的好处。

第二节：完形填空(共20小题；每小题1.5分，满分30分)

　　阅读下面短文，掌握其大意，然后从41～20各题所给的四个选项(A、B、C和D)中，选出最佳选项。

　　My husband and I have six children and things have been tight financially.

　　He is a brick mason(泥瓦匠) and as a barter deal(易货交易) he agreed to __1__ a sign base for a man who owns a sign company __2__a puppy.

　　The job was at the front of a cemetery(墓地). As we were __3__beside a busy road we noticed a well­dressed man __4__to us. I looked __5__him and saw his car was parked on the roadside. When he __6__us he asked if we had any __7__he could have.

　　My husband reached into the back of the truck and __8__him a can with a gallon or two of gas and told him it should be enough to get him to the __9__gas station.

The man __10__my husband and walked back to his car. About twenty minutes __11__and we finished our work. We __12__ten more minutes and the man still hadn't __13__with our gas can.