Let's keep this a secret.

This is a watch made in Japan.

This is because of the difference between Japanese politeness and American politeness.

This is a book to read.

It's just too good to pass up .

I might well tell you this.

This is a great time-saving gadget for the housewife.

This is an actual happening.

This is the same bicycle as mine.

This is my coat, and that is my father's.