"If you make a promise ",you must keep it-

The guests arrive 'after sunset "-

I know "where he lives"-

They asked me "if I could meet them in the afternoon "

This is the Place Where i was born.Here " where i was born is?

I know that he will come.Here " I know "

I took no notice of him, so he flew into rage

I know Where he lives.Here " Where he lives"

This is the Place where i was born. Here "Where i was born"

"Strike while the iron is hot' is an example

He is ( in the room)

He stood ( in front of me)

( That he is very intelligent) is known to me

1)She does not know what I want.Here "what I want" is a/an-

2)Behave as a gentleman behaves.Here "as a gentleman behaves" isva/an-

3)Where he lives is a mystery. Here "Where he lives" is a/an-

4)It's a mystery where he works."where he works" is a/an-

5)You cannot get the chance to be enrolled in a university unless you study hard.
"unless you study hard" is a/an-

6)As I trust myself, I don't need to write a number on it.
"As I trust myself"-

7)What he said is important?
"What he said"-

8)The poor boy who was an orphan could not continue his studies.
"who was an orphan"-