C. How to train a pregnant woman for marathons

D. A pregnant woman giving birth after a marathon

　　　　　　　　　 B

　　The following simple exercise routine works as well as prescription medication (处方药) without side effects.

　　A jog a day could keep your headaches at bay: regular cardio workouts (健心锻炼) may prevent migraines (偏头痛), a growing body of research suggests.

　　Migraine patients had fewer headaches after doing 40-minute cycling workouts three times a week for three months, according to a Swedish study.

　　The exercise routine worked just as well as one of the top migraine-preventing drugs-topamirate - but without side effects of depression and tremors (颤抖) .

　　"Cardio workouts can help with regular headaches, too," says Alexander Mauskop, M. D. director of the New York Headache Center in Manhattan.

　　There are a couple of theories on how it works.

　　"Breaking a sweat may relieve stress," says Dr. Mauskop. Headaches are often triggered by stress, and if you remove the trigger, you release the pain.

　　The feel-good chemicals produced when you exercise actually block your pain sensors, acting as a natural painkiller.

　　Since headaches can be caused by many different factors like genetics (遗传), lack of sleep, or certain foods, the cardio workout won't be the solution for everyone, Dr. Mauskop says. But one German study found that it helped 65 percent of patients, which makes it as effective as the best medicines on the market.

　　Dr. Mauskop recommends his patients do a half-hour reasonable intensity (强度) cardio workout, like jogging, biking, or swimming three times a week. These workouts are meant to be slow and steady, as opposed to high-intensity intervals that alternate between all-out runs and rest.

　　Pushing yourself too much or increasing the intensity too quickly can trigger headaches in some people, so make sure your heart rate doesn't jump above 150 BPM. If you don't have a heart rate monitor, then breathe only through your nose. You'll know you're going too hard if you can't keep up that breathing pattern.

　　Your migraines could start disappearing in a couple of weeks, Dr. Mauskop says.

5. According to the passage, the author may agree that ________.

A. jogging, swimming and fishing are cardio workouts

B. neither cardio workouts nor topamirate has side effects

C. migraine patients may be cured by regular cardio workouts

D. cardio workouts will be the solution for everyone with migraines

6. The underlined word "triggered" in Paragraph 7 can be replaced by "________".

A. cured B. released

C. caused D. monitored

7. The feel-good chemicals produced can relieve regular headaches because ________.

A. they ease stress

B. they help break a sweat

C. they prevent migraines

D. they block your pain sensors

8. What would be the best title of the passage?

A. A cure for headaches

B. Side effects of migraines

C. The causes of headaches

D. Advantages of cardio workouts

Ⅱ. 完形填空

　　It was in 1976, an Olympic year. My school 　1　 to test students' ability in 　2　 contests like team sports tournaments, math competitions, etc. The teachers selected several people-myself 　3　-as team captains. As captains, we had to