单元自测试卷八年级英语下学期人教版
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（
B
）1. The picture above is about _______.
A. plants
B. animals
C. sports
D. languages
答案：B
解析：图片标题为“Spot a Polar Bear”（发现北极熊），主要介绍的是北极熊，北极熊属于动物，所以选B。
（
D
）2. What do polar bears mainly eat?
A. Plankton.
B. Krill.
C. The Arctic Cod.
D. The leopard seal.
答案：D
解析：根据食物链图“Krill → Leopard Seal → Polar Bear”以及“Polar bears are at the top of their food chain in the Arctic.”可知北极熊主要吃Leopard Seal（豹海豹），选D。
（
C
）3. What can we learn from the picture?
A. Polar bears have white fur all over the body.
B. Polar bears have a big head and a short tail.
C. Polar bears can keep themselves warm.
D. Polar bears can live for at least fifty years.
答案：C
解析：A项与文中“Polar bears don't have white fur in fact! Their fur is see-through...”不符；B项“small head”说明不是大头；D项“live for 15-30 years”不是至少50年；C项“Polar bears have thick fat to keep themselves warm.”正确，选C。
