1 . 阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

A new study found that nearly half of bald eagles    1    (test) across the United States show signs of repeated lead (铅) exposure. Researchers examined the blood, bones, feathers and liver tissue (肝脏组织) of l,210 eagles between 2010 and 20l8.

Lead is a poisonous substance     2     affects the nervous system and interferes (妨碍) with the normal function of nerve cells. Even in low amounts, lead can reduce bald eagles’ ability     3     (fly), hunt and reproduce. In high amounts, lead causes     4    (breathe) difficulty and death.

Bald eagles are one of America’s most celebrated conservation success stories. The birds       5    (remove) from the U. S. Endangered Species List in 2007. But scientists say that high lead levels are still     6     concern. Lead exposure also reduces their ability to face future difficulties, such as climate change or infectious diseases.

“Lead is available to these birds more than we     7    ( previous) thought,” said VinceSlabe, a research wildlife biologist at the nonprofit group Conservation Science Global.

The blood samples from live eagles in the new study were taken from birds trapped andstudied     8    other reasons. The bone, feather and liver samples came from eagles killed by vehicles, power lines or other causes.

The researchers also found higher levels of lead exposure in fall     9    winter. During these months, eagles eat animal remains left by hunters. These remains often contain many    10    (piece) of lead ammunition (弹药).

2 . Sharing a bed with a pet at night is a common feature of nighttime routines in the United States. According to a 2021 —2022 survey, 43 percent of pet dogs in the United States and 49 percent of pet cats sleep on their owner’s bed. When it comes to the perks of sharing your bed with your favourite furry friend, however, experts are divided.

First, it’s worth noting that the majority of research on the topic of co-sleeping with pets has focused on dogs rather than cats. Mark Fierstein, an internal medicine specialist at NYULangone Health in New York City, suggests this is because cats may want to play or even purposely wake up their owner. Rabbits or hamsters are also out of the question.

A benefit of sleeping with pets is that the practice may prevent loneliness, Fierstein says. “Often, people who co-sleep with pets report an increased sense of security, companionship, and relaxation,” he notes. “For some people, the dog’s warmth, steady heartbeat, and protective nature can make sleeping with them feel safe and cozy.” This may be especially true of people who are managing trauma (创伤) or post-traumatic stress disorder (PTSD). LeslieSinn, a psychologist, says according to a survey, 60% of PTSD suffers feel calm down if they wake up to see the presence of the dog.

Some research suggests co-sleeping with pets may increase mid-night awakenings for people. “If the owner is a light sleeper, he or she may not do well with a dog or cat in the bedroom,”notes Fierstein. For example, he points out that a dog who snores (打呼噜) loudly is not an ideal sleeping mate.

Dogs may also show aggressive (好斗的) behaviour — such as biting. Allowing pets in the bedroom can also expose owners to potential allergens (过敏源), like pet hair, as well as viruses that cause disease.

1. What does the underlined word “perks” mean in the first paragraph?

A．Feelings.

B．Dangers.

C．Plans.

D．Advantages.

2. Which might be a suitable pet to share a bed with?

A．A cat.

B．A dog.

C．A rabbit.

D．A hamster.

3. What is a benefit of sleeping with pets?

A．Protecting pets.	B．Avoiding loneliness.
C．Saving money.	D．Keeping busy.

4. What is the best title of the passage?

A．Who Can Sleep with a Pet?	B．Is It Beneficial to Keep a Pet?
C．Is Sleeping with a Pet a Good Idea?	D．What Kind of Pet Can we Co-Sleep with?