It was with great joy ________ he received the news that his best friend would come to Beijing．

1. A.
   because
2. B.
   which
3. C.
   since
4. D.
   that

It was with great joy _______ he received the news that his best friend would come to Beijing．

　 A．because　 B．which　　 C．since　　　　 D．that