She had been nursing her father for a long time.

Prevention of venereal diseases is important.

My cat's forehead is very small.

He was in a sickbed for a long time.

His grandfather is suffering from Alzheimer's disease.

I decided to take a sick leave.

My grandfather passed away from tuberculosis.

When a leap second is added, the world's clock shifts by one second.

The first day of the month is the beginning of a new month.

I have been to France once.