单选题 Human beings, by providing environmental enrichment, encourage animals to explore, interact, and ______ natural behaviors.

A、 endure

B、 exhibit

C、 recruit

D、 assume

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相关试题

单选题 What's the most popular type of blog according to the passage?

A、Commentaries.

B、Personal diaries.

C、Mobile blogging.

D、Online diary of links.

单选题 What is the author's main point in this passage?

A、Traveling by car is safer than flying.

B、It is illogical to be afraid of taking airplanes.

C、Traveling by airplane is not suitable for everyone.

D、Cars are a more reliable form of transport than planes.

单选题 What is this passage mainly about?

A、The history of the Internet.

B、The increasing use of computers.

C、The popularity of a new type of media.

D、The growing number of people writing diaries.

单选题 A person with a fear of enclosed places doesn't like ______.

A、being in a tunnel

B、walking on a path

C、driving a car alone

D、staying in high places

单选题 According to the passage, a phobia refers to ______.

A、a chemical that causes fear

B、an illogical way of reaction

C、a reasonable way of thinking

D、a reliable way of predicting danger

单选题 What is the main difference between blogs and traditional websites?

A、Blogs are updated more often.

B、Blogs only use special software.

C、Blogs contain links to other websites.

D、Blogs often contain personal information.

单选题 ______ especially bother older people.

A、Enclosed places

B、Dangerous spiders

C、Crowds at airports

D、High-rise buildings

单选题 ______ usually think flying is boring.

A、People who only fly once in a while

B、People who fly often for business trips

C、People who have a phobia about flying

D、People who are afraid of poisonous spiders