阅读理解C Bees are essential for the pollination of flowers, fruits and vegetables. Sadly, over th

阅读理解C  
    Bees are essential for the pollination of flowers, fruits and vegetables. Sadly, over the past 15 years, the global population of the hardworking insects has been dropping worldwide at alarming rates due to loss of food and habitat. Now, Dutch cities are coming up with creative ideas to help stem the population decrease of these all-important insects.
In Amsterdam, bees can live for free in specially built “hotels” — tall wooden structures — across the city. While they may not look like much to the untrained eye, they provide perfect homes for members of the over 200 known species of solitary bees. As the name indicates, the insects spend their lives alone. The smart insects nest inside holes like the ones provided by the insect hotels, marking their occupancy by covering the entrance with a mud “door”. Though unable to produce honey, solitary bees are excellent pollinators and perform an essential role in many ecosystems.
Additionally, city officials are also educating people on the use of harmful chemicals and are providing prize money to encourage developers to build green roofs and populate them with local plants. In 2015, they set a goal to change some plants in public green spaces to native plants. Geert, one of eight ecologists working for the city, says, “Our idea is when we design a park, we use native species but also the species that give a lot of flowering and fruit for bees.” Many people, with help from the government, are replacing the sidewalks outside their homes with small gardens featuring flowers.
In Utrecht, bus stop roofs are gradually being turned into beautiful, living gardens designed to attract varieties of bee species. The green roofs, which naturally collect both rainwater and dust, are also beneficial for the environment.
These cities’ collective efforts seem to be working. A recent study found that the variety of bee species there has increased by an astonishing 45 percent since 2000.
38．What does the underlined word “stem” in Paragraph 1 probably mean?
A．Review . B．Stop. C．Monitor. D．Improve.
39．What’s special about the bees in Amsterdam?
A．They’re not social insects.
B．They make high-quality honey.
C．They like to nest together in woods.
D．They’re scared of other species of bees.
40．What are bus stop green roofs mainly meant to do?
A．Collect rainwater for future use.
B．Plant flowers for enjoyment.
C．Draw bees to them.
D．Clear dust away.
41．What’s the text mainly about?
A．Protecting the environment.
B．Importance of bees in ecosystems.
C．Design ideas of insect hotels and bee stops.
D．Dutch cities’ attempts to restore bee population.
【答案】38．B39．A40．C41．D
【解析】