(
D
)1. What do polar bears have?
A. A good sense of touch.
B. A good sense of hearing.
C. A good sense of sight.
D. A good sense of smell.
(
A
)2. According to the passage, what problems are polar bears facing?
A. Pollution and global warming.
B. Lack of sleep and being hunted.
C. Lack of food and the loss of land ice.
D. A bad sense of smell and pollution.
(
D
)3. What can we learn from the passage?
A. Polar bears' fur is white.
B. Polar bears can have more than three babies at a time.
C. Polar bears have a good, happy life.
D. It's easier for polar bears to find food at night in summer.
