We are living in an age ______ we treasure very much, because it sees man’s rapid development.

We are living in an age ______ we treasure very much, because it sees man’s rapid development.

We are living in an age ____________ we treasure very much, because it sees man’s rapid development.

A. which　　　　　　 B. when　　　　　　　 C. where　　　　 D. what

We are living in an age ______ we treasure very much, because it sees man’s rapid development.

1. A.
   which
2. B.
   when
3. C.
   where
4. D.
   what

We are living in an age ____________ we treasure very much, because it sees man’s rapid development.

 A. which              B. when               C. where          D. what