单元自测试卷八年级英语下学期人教版
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（
C
）4. What do bees do in the forest?
A. They build nests.
B. They play with flowers.
C. They help with pollination.
D. They eat plants.
答案：C
解析：文中提到“bees play an important part in pollination... they help the flowers pollinate.”，所以蜜蜂在森林里帮助授粉，选C。
（
A
）5. What happens if there are no bees?
A. Many plants can't reproduce.
B. The forest will be more beautiful.
C. Other animals will do the pollination.
D. Bees will come back soon.
答案：A
解析：根据“If there are no bees, many plants can't reproduce.”可知没有蜜蜂很多植物无法繁殖，选A。
（
A
）6. What do trees do for animals?
A. They provide food and shelter.
B. They make the forest noisy.
C. They stop animals from moving.
D. They eat animals' food.
答案：A
解析：文中明确指出“They provide food and shelter for many animals.”，所以树为动物提供食物和住所，选A。
（
B
）7. What should we do according to the passage?
A. We should destroy the ecosystem.
B. We should protect the ecosystem and keep it balanced.
C. We should cut down all the trees.
D. We should kill all the animals.
答案：B
解析：短文最后提到“We should protect the ecosystem and keep it balanced.”，选B。
