This offer is open for five days.

"If it's a light workout, OK." "Right, so will we allow crotch-kicking and eyeball crushing?"

It would be difficult to improve the device without an effective catalyst.

The court adjudged that the will was valid.

They are making good use of the heat from the sun.

His contract runs for one more year.

An effective writer is one who knows what sort of words should be employed in any specific context.

It is how effectively you use the available time that counts.

Make the most of your college life.

The promise I made to you last week still holds true.

The ticket holds good for three days.

How long is the ticket good for?

The ticket holds good for three days.

If you want to succeed, use your time well.

It is how effectively you use the available time that counts.

You should make the most of your time while you are young.

You have to beat the time.

You must make the most of your time.

I had a valid visa, so I was allowed to enter the country.