My cousin is bilingual; she can speak both English and Spanish fluently.

She is susceptible to colds.

I am in the classroom.

Migration is a natural phenomenon that has been happening for centuries.

The study will confine its focus on children under 10 years old.

His scandalous behavior will degrade his reputation.

Scientists discovered a rare fossil of a prehistoric bird.

One disadvantage of living in a big city is the high cost of living.

Slavery was abolished in the 19th century.

The circulation of blood is essential for maintaining good health.