McCormick Place in Chicago, the largest convention center (会议中心) in North America, is covered in glass that is enjoyable for humans but deadly for birds. On Oct 5, over 1,000 migrating birds died from colliding with (相撞) its glass walls in a single day.

According to data from Cornell University, the number of birds killed there during that one night is roughly equal to the typical yearly bird collision deaths at the building.

One key reason for the accident is the glass. During the day, birds fly toward glass as it reflects a perfect image of the sky and nearby trees. As night falls, the bright light from glass buildings attracts birds who fly according to the location of the moon and stars. The recent collision happened on the night of Oct 5, when the lights in the building were on for an event.

After colliding with a building, many birds will die on the spot from a broken skull. Others may continue to fly for some distance, but they rarely survive for more than a few hours, as Brendon Samuels, who researches bird window collisions at the University of Western Ontario, Canada, told The Guardian.

Every year, nearly one billion birds collide with glass in the US, according to the US Fish and Wildlife Service. In China, bird collisions are not uncommon, either. In the autumn of 2022 and spring of 2023, the National Anti-bird Collisions Action Alliance reported a total of 190 cases of bird collisions, which included several types of birds listed as second-class protected wildlife.

These tragedies (悲剧) could have been avoided if appropriate (合适的) measures had been taken. Many places around the world have already put forward bird-related guidelines on building design. These include reducing the use of glass in building walls and applying bird-friendly materials and visual markers (视觉标记) to the buildings’ walls. Turning off lights at night during migration seasons can also significantly help reduce bird collisions.

Alongside guidelines on bird-friendly building design, people can also do their bit to help birds by putting stickers (贴纸) on glass windows in their homes and closing the curtains at night.

【小题1】What do we know about the bird collision event that happened in Chicago on Oct 5?

A．It happened during the day.

B．About 10,000 birds were killed.

C．McCormick Place closed because of it.

D．The building`s glass is a key cause of it.

【小题2】According to the passage, what happens to the birds after they collide with buildings?

A．Many die instantly or within a few hours due to injuries.

B．They fly back to where they came from.

C．They will be rescued and rehabilitated.

D．Most survive but with minor injuries.

【小题3】What are the typical characteristics of bird-building collisions?

A．Common and harmful to birds.

B．Unavoidable and friendly to birds.

C．Rare and damaged to both birds and buildings.

D．Infrequent and preventable to both birds and buildings.

【小题4】What measure is suggested to help prevent bird collisions?

A．Building taller structures.

B．Painting buildings in bright colors.

C．Increasing lighting around buildings at night.

D．Reducing glass and adding bird-safe materials in buildings.

【小题5】What does this passage mainly talk about?

A．The effects of closing curtains at night on bird migration.

B．The National Anti-bird Collisions Action Alliance report.

C．The tragedy of bird collision with building glass.

D．The largest convention center in North America.