He is always joking around during class.

My friend lives in Norwich.

Richmond is a beautiful town in London.

We will conduct a practical test of the new product next week.

We conducted an on-the-spot investigation to verify the performance of the new product.

He was caught hiding a pornographic magazine.

Mr. Yakimoto is my best friend.

This book, which is missing a large proportion of its scrolls, is a 'zero book'.

He is reading a thin book.

This bibliography is a valuable existence that conveys ancient history.