課后練習：

1. It’sclear the brain benefitsfrom exercise.

A.which B. where C.when D.that

2.Vigorous physical exercise provides the brain with more fuel, and skill-basedexercise increases the formation of connections in the brain, may make the brain better able toprocess information.

A.which B. where C.when D.that

3. animals aren’t people, it islogical to make the inferencethataneffect found in rats may alsoapply tohumans.

A.which B. where C.while D.that

4. Theanimalsthatexercised inside theautomatic wheel a greaterdensity ofblood vesselsin thebrainthandideither of the other two groups of animals.

A.processed B. possess C. process D. possessed

5.Inactive adults，aged 63 to 82, could hit buttons festerin response toa toneafterthey went through water exercise course.

A.10-weeks B. 10-week C.a 10-week D. a 10-weeks

6. Somescientistsspeculatethe reductionin mental function getting oldmay reallybe penalty of tostayphysically active.

A.attributing to; neglected B.attributed; neglecting

C.attributedto; neglected D. attributedto; neglecting

7. Butuntil recently,the academic edgegained by participating in sports come fromthe increased self-confidence, the better mood and theability toconcentrate that comes fromburning off steam in exercise.

A. wasthought to B. is thought to C.thought to

8.Inactivity negative effects onmind and bodyalike.

A. mayalso has B. may also have C. may also had

9.“Scientists recognize that mind is body, and body is mind,”

Howard.

A.connects B. corrects C. concerns D. comments

答案：請在課文中尋找。

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