What were you and your sister doing when the telephone rang?— I while my sister was eating.

What do you want to be when you _______? —–An astronaut.

Shall we call for a taxi?—OK. Let me _______ the phone number in Yellow Pages.

It is a common practice in the USA that one needs to make a(n) ___ before seeing a doctor.

More than 20 people ________ in traffic accidents ________ last May.