1．The study showed a deep fear among the elderly of being ________ to the care of strangers.
A．dismissed B．abandoned
C．stood D．quit
2．The water in the lake is so clean and calm that the ________ of the trees in the water is very clear.
A．mirror B．sight
C．reflection D．shadow
3. The passengers had a chat with the college students______
as conductors during the summer vacation.
A．help out B．helped out
C．to help out D．helping out
