Hardly had the thief seen the policeman than he ran away.（）

A:had B:seen C:than D:ran

Hardly had the thief seen the policeman than he ran away.（）

A:had B:seen C:than D:ran

—Have your students ever seen the silent film
—No, they are too young （　）the old film.

A:to seeing B:have seen C:to have seen D:to have not seen

--Have your students ever seen the silent film
--No, they are too young （） the old film.

A:to seeing B:have seen C:to have seen D:to have not seen

--Have your students ever seen the silent film --No, they are too young ______ the old film.

A:to seeing B:have seen C:to have seen D:to have not seen