He bought a very good knife a week ago (Where…?)

Where (a)   a very good knife?

He adds some sauce to this dish (What sauce…?)

What sauce (a)   to this dish?

His wife bakes wonderful cakes by times (How often…?)

How often (a)   wonderful cakes?

He looked very surprised yesterday (Why…?)

Why (a)   very surprised yesterday?

They will call you back later (When...?)

When (a)   you back?

Tim can write small poems (What poems...?)

What poems (a)   ?

Ann would like to have a cup of tea (What tea...?)

What tea (a)   to have?

Our students get to college by subway (How often...?)

How often (a)   college by subway?

They could offer some extra courses to our students (What courses...?)

What courses (a)   to our students?