The colored students held a one-week moratorium on classes to oppose racism.
He opposed himself to the scheme.
The hospital is opposite to the post office.
They have opposite views on the issue.
Cares oppressed his spirits.
He opted to go alone.
He has an optical defect.
I look to our future cooperation with optimism.
We have the option of going or not.
Contributions are optional.
The spaceship orbited the moon.
There is an apple orchard behind the house.
The orchestra is preparing for a concert.
Her life has been full of ordeals.
The girl students' rooms are all in orderly condition.
Iron ore is found in rocks.
The eyes, stomach, heart, and lungs are organs of the body.
This country is a member of the United Nations Organization.
Many Americans are African by origin.