She was thinking with her hand on her forehead.

This three-legged kettle is from ancient China and is very valuable.

We aim to offer the best service to our customers.

The calculation of definite integrals is an important part of calculus.

The Ottoman Empire was once a powerful empire that existed in the Middle East.

Imperialism is a political ideology where some countries dominate others.

The submission of the report is due tomorrow.

I cannot oppose his decision.

He affirmed my proposal.

Last night, all the lights went out due to a sudden blackout.