The weather changed dramatically overnight.

I conducted a scientific experiment to test my hypothesis.

I need to consult with my lawyer before making a decision.

The uncertainty of the future is causing anxiety.

She is ill and cannot come to work today.

I need to keep track of my monthly expenses.

The atmosphere in the room was tense.

Can you identify the person in this photo?

What is all this bother about?

I made a copy of the book.