This machine needs amelioration.

We need to ameliorate this system.

I often go shopping on weekends.

The new road has been opened to traffic.

He attended a class on dissection.

The police are cornering the kidnapper.

He walked quickly down the corridor.

There are many clam shrimps living in this pond.

He showed a skeptical attitude towards the proposal.

A new post office has opened in this town.