(
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. 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.
(
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.
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.
答案：1. D 【点拨】根据“Polar bears have a very good sense of smell.”可知，北极熊有很好的嗅觉。故选 D。2. A 【点拨】根据“This is happening because of global warming. Besides, they also have to face pollution, being hunted and so on.”可知，北极熊面临着全球变暖、污染、被猎杀等问题。故选 A。3. D 【点拨】根据“During summer, polar bears sleep longer in the day, because they are able to find their food more easily at night.”可知，在夏天，北极熊在晚上更容易找到食物。故选 D。