Everyone was on guard because of his suspicious behavior.

Everyone was on guard because of his suspicious behavior.

His attitude toward his work is very admirable.

Let's all go to the sea.

This program values the opinions of its viewers.

After the earthquake, he increased his precautions.

We always need to be vigilant against fraud.

I thought his conduct was suspicious.

Don't you think his behavior is suspicious?

His behavior was suspicious, so I reported it to the police.