26. Mr. Green has two sons, one of _____ working as a bus driver now.
This is the best chance for you to go abroad. Don't ________.
---Have you ________? ---No. I had the wrong number.
— Are you sure the delegation will come to our school next week? — _____. The head of it has just emailed me about the departure time of their flight.
The book tells stories of the earthquake through the eyes of those _______ lives were affected.
Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food products are safe _____.