The picture I took in the countryside ______ me of the time when I stayed there.
The manager told the assistants to _______ all the customers’ names and address.
--- Have you finished the book? --- No, I’ve read up to _______ the children discover the secret cave.
He was late for the meeting _________ the heavy snow.
They tried to convince her _______ his innocence.
We can never expect ______ bluer sky unless we create _______ less polluted world.