He didn’t bat an eyelid when he realized he failed the exam again.

He had never experienced such discourtesy towards the president as it occurred at the annual meeting in May.

Around 150 B. C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.

In daily communication, you should know how to interpret other people’s body language.

The purpose of this survey is to determine students’ attitudes toward love and marriage.

The ages of the two children put together was equivalent to that of their father

I’m becoming increasingly absent-minded. Last week, I locked myself out of my house twice.

Ralph Nader was the most prominent leader of the U. S consumer protection movement.