题目内容：

Many people have heard bee populations are declining due to such threats as pesticides(杀虫剂). And many understand bees are important to plant pollination(授粉). Yet, according to a study led by Utah State University ecologist Joseph Wilson, few are aware of the wide diversity of bees and other pollinators beyond such species as honeybees.

“The U.S. Postal Service recently put out its Protect Pollinator series, which features only the European honeybee and the monarch butterfly,” says Wilson, assistant professor of biology at USU’s Tooele campus. “A social media commenter observed that using these two species on a campaign to protect pollinators is similar to focusing on chickens to save birds. It’s a pretty good comparison, actually.”

Wilson, with colleagues Matthew Forister of the University of Nevada-Reno, published findings in the Sept. 5, 2017, online edition of Frontiers in Ecology and the Environment.

“In our recent survey, 99 percent of our respondents said bees are important, yet only 14 percent were able to guess within 1,000, the actual number of bee species in the United States,” he says. “Most people guessed around 50 species of bees, while the correct number is about 4,000 known species.” Further, when shown images of varied insects, many people were unable to distinguish bees from non-bees.

“A challenge with lack of knowledge about bees is you can’t protect what you’re now aware of,” Wilson says. “We could be losing species or causing decline and not even know it.”

Public education is key to encouraging conservation efforts, he says. “Because conservation efforts require substantial public support, it’s important that the public understand bees and what needs to be done to protect these species,” Wilson says. “Education is the key to understanding bee declines and protecting our pollinators.”

1.According to the text, bees function as __________.

A. honey-makers

B. pest-killers

C. producers

D. pollinators

2.What can we infer from Paragraph 2?

A. Wilson is in support of the Protect Pollinator series.

B. The commenter observed honeybees and butterflies.

C. People neglect many other pollinators.

D. Protecting chicken can help save birds.

3.What does the underlined word “substantial” in the last paragraph mean?

A. legal.

B. large.

C. minimum.

D. slim.

4.What is the best title for the text?

A. Not Only Honeybees

B. Protection of Honeybees

C. Growing Threats to Bees

D. Newly Discovered Bee Species