I was surprised by the strict security check at this airport.

I was really astonished by his sudden proposal.

I was taken aback by his sudden proposal.

Lo and behold, he passed the exam.

We need to enhance the security of this system.

We need to strengthen the security of our company.

I will go to the airport tomorrow.

I check my emails every morning.

I check my emails every day.

The security police ensure our safety.