Some people feel sad or depressed __________ the winter months.

Scientists have discussed the issue __________ the beginning of medicine.

More than 2000 years __________ the Greek doctor Hippocrates noted that the seasons affect human emotions.

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

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

The Normans conquered England nearly 1000 years __________ .

Europeans have drunk coffee __________ the 18th century.

Penicillin was discovered __________ the 20th century.

Automobiles were invented over 100 years __________ .

Telephones have existed __________ the 19th century.

A hundred years __________ people had no computers.

India has been independant __________ 1947.