Please store this medicine in a cool, dark place.

Observing manners is important in social life.

I do laundry using synthetic detergent.

He has already finished writing the report, so we use the present perfect form.

I repaired the broken vase using instant glue.

She is learning the grammar of the present progressive form.

The phrase 'the good and bad deed cancel out' perfectly describes his past actions.

This lime sulphur is very effective in preventing pests and diseases in fruit trees.

This is a once in a lifetime opportunity, so please don't miss it.

This is truly a once in a lifetime opportunity.