The professor gave an explanatory lecture on the topic.

He performed poorly in the exam.

The supervisor is responsible for overseeing the team's work.

She is eager to learn new things.

This app is very convenient for managing your schedule.

She is fluent in French.

The provider of the service was very helpful.

He has a mechanical watch.

I went to the supermarket to buy some food.

I have finished my work, but there is still a remainder of tasks to be completed.