Homo erectus played a significant role in the process of human evolution.

It is said that secondhand smoke has a negative impact on health.

My younger brother goes to a school for special needs.

This area was formed under the influence of a lava dome.

Protectionist policies are introduced to protect domestic industries from foreign competition.

My younger brother attends a class for special needs.

The ship entered the port flying a quarantine flag.

Could you attend the meeting on my behalf?

Let's go to see a movie.

I am good at calculations.