Ten minutes____ an hour when one is waiting for a phone call.
---Was it the new school headmaster who walked by ? --- _____.
Have you really realized the part computers have_______ in the daily life?
Bob is determined to get a seat for the concert _______ it means standing in line all night for the ticket.
As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.
The woman, when ______ how her husband was injured, began to cry.