1 . “Nothing will ever be the same again,” Ally said to herself.

Ally’s father _______ last summer. It wasn’t fair, Ally thought. Dad was young and had never been sick. Why had his heart _______ stopped? Ally sank slowly into her father’s favorite chair and looked at his picture on the bookcase. “I miss you, Dad,” she said _______.

She felt a hand smoothing her hair and _______. “Why don’t you come outside with me , Ally?” her mother asked. “By this time last year you’d already taken dozens of pictures of birds.”

But her mother must know bird watching wouldn’t be the _______ this year. How could it be? Ally wondered. Ever since she could remember, she and Dad had been a team, _______ the woods for the special wood warbler (林莺). “I’ll be out in a while, I promise,” she answered.

After her mother left, Ally _______ the photo album. On the cover was a photo of a tiny yellow bird with blue-gray wings and black eyes. Dad _______ it from a local newspaper. Ally smiled, remembering the _______ look on Dad’s face when he showed her the pretty bird.

“I can’t ________ someone spotted this little guy way up here in New Jersey,” he said. “Wood warblers are usually ________ in the south not this far north. I bet ________ we search real hard, Ally, we’ll see this little guy together someday.”

Ally closed her eyes. She loved ________ about the times she and Dad had spent searching the woods for the little bird. They’d never spotted the warbler ________ her father had an amazing way of making each outing seem ________. If only I could get that good feeling back, she thought, sighing.

2 . China is an amazing country, on the Internet, only you can think of, there is nothing you can’t buy.

9 . In the rich countries of the West, the electric vehicle revolution is well occurring. Climate-conscious consumers drive Teslas or Polestars for reasons of morality (道德) and fashion. Poorer countries are also experiencing a wave of electrified trend. In Bangladesh, electric three-wheeler taxis, known as tuk-tuks, are rapidly replacing gas-powered ones on the streets. Such electric vehicles are climate friendly, cost effective, and help reduce air pollution.

Yet a glance under the hood (引擎盖) of these vehicles shows a poisonous secret: each tuk-tuk runs on five massive lead-acid batteries (铅酸电池), containing almost 300 pounds of lead (铅) in total. Every year and a half or so, when those batteries need to be replaced and recycled, about 60 pounds of lead leaks into the environment. Battery recycling, often at small-scale unregulated factories, is a highly profitable (高利润的) but deadly business.

Lead is dangerous, and any exposure to it is harmful to human health. Lead that has entered the environment hurts people on an unexpected scale. The numerous ways lead enters air, water, soil, and homes across the developing world and the enormous damage it does to human health, wealth, and welfare cause one of the biggest environmental problems in the world yet receives little attention.

The World Bank estimates that lead kills 5.5 million people per year, making it a bigger global killer than AIDS, malaria, diabetes, and road traffic deaths combined. On top of the shocking deaths, the social burden of lead poisoning is heavy, as is its contribution to global inequality — our research on the cognitive (认知的) effects of lead poisoning suggests that it may explain about one-fifth of the educational achievement gap between rich and poor countries.

But unlike many challenges faced by developing countries, lead poisoning is a problem that can be resolved through financial investment (财政投入). Better monitoring, research, and rules can help protect children all over the world from the unpleasant effects of lead poisoning and reduce the massive global costs it brings.