It ____I who _____leaving for London.

The old professor has three sons，________are doctors.

!Somebody _____the sofa.— Well,it wasn’t me. I didn’t do it.

Is there anything Ican do for you—There seems tohave been a technical problem—______，that’s what they toldme．

u know ____ made him successful in his career—Yes. His hard work and determination, of course.