20 câu trắc nghiệm Tiếng Anh 11 Unit 7: Ecological Systems- Vocabulary & Grammar- iLearn smart world có đáp án

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The red squirrel in England is in danger of ______.

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One of the factors that cause a species to become endangered is habitat ______.

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Scientists have been developing practical tools and methods to measure the ______ of the ecosystem.

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Natural resource managers ______ the needs and behaviors of wildlife.

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Naturally, many different species in this freshwater ecosystem share the same kind of ______.

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The national park was established to ______ the ecosystem of the limestone forests.

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Ha Long Bay is the product of geological ______ that lasted more than 500 million years.

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The ______ living by the river has been uprooted and then transported away.

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Ecotourism is a useful tool to manage and ______ natural and cultural landscape.

The new varieties of rice grow well ______ in poor soil.

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Scientists ______ about the rabbits’ activities for three years since the scientists realized that the rabbits had eaten many native plants in the area.

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The search for the new kind of penguin in Antarctica has been ______ international media attention.

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Scientists have been studying different ecologies ______ the 20^th century.

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Some people ______ down lots of trees along the river for the past two weeks.

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The local farmers are trying to stop the invasive species from spreading for the past six months.

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Scientists have been studying the elements that affect the develop of the native species.

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Tracy: “I think plastic bags are not as harmful as people say. Instead, they provide great convenience.”

Nathan: “______. Plastic bags are among the biggest threats to our environment.”

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What does the notice mean?