Jack is late again. It is ________ of him to keep others waiting.

This ________ girl is Linda’s cousin.

—Have you seen my pen bought during my visit to Hong Kong Disneyland?—Oh, Jane must have taken it _________ ; she has the same one as yours.

I've heard from a __________ source that many of the workers may lose their jobs because our company is running very badly. 

Milu deer，which used to be ______ in China long ago，is a rare animal nowadays.