Some people feel sad or depressed __________ the winter months.
- during

- ago

- since

Scientists have discussed the issue __________ the beginning of medicine.
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More than 2000 years __________ the Greek doctor Hippocrates noted that the seasons affect human emotions.
- during

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People with Seasonal Affective Disorder are well __________ the spring and summer.
- during

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In winter, it is good for people with S.A.D. to spend a lot of time outdoors in the fresh air __________ the day.
- during

- ago

- since

The Normans conquered England nearly 1000 years __________ .
- during

- ago

- since

Europeans have drunk coffee __________ the 18th century.
- during

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- since

Penicillin was discovered __________ the 20th century.
- during

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Automobiles were invented over 100 years __________ .
- during

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- since

Telephones have existed __________ the 19th century.
- during

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A hundred years __________ people had no computers.
- during

- ago

- since

India has been independant __________ 1947.
- during

- ago

- since
