Is Mary friend?—No,isn’t.

Is_______ necessary to learn another language? — I think so.

What do you think of the film called Inception《盗梦空间》?—The film is full of suspense (悬念). I should say the screen-writer is really ______.

Is Mary still performing?—-I’m afraid not. She is said_____ the stage already.

His mother was born in Greece, and Greek was her native language, ___.