The society was set up to endangered species form extinction.
Tom kept silent about the accident ______ lose his job.
She ______ me at the other end of the telephone line, though we hadn’t seen each other for a long time.
—Where are you ________? —I’m going to the airport to ________ my friend.
I’m ______ captain of the class team at school and I’m also ______ member of the Senior High team.
From time to time a crocodile has snatched someone _______ he or she is even aware that the crocodile is there.