Kim Cobb, a professor at the Georgia Institute of Technology in Atlanta, is one of a small but growing minority of academics     1     are cutting back on their air travel because of climate change. Travelling to conferences, lectures, workshops, and the like frequently by plane       2    （view） as important for scientists to get together and exchange information. But Cobb and others     3     （be） now questioning that idea pushing conferences to provide more chances to participate remotely, and     4    （change） their personal behavior to do their part in dealing with the climate change crisis. On a website called No Fly Climate Sci, for example,     5    （rough） 200 academics - many of them climate scientists     6     （promise） to fly as little as possible since the effort started two years ago.

Cobb, for her part, started to ask conference organizers who invited her to speak     7     she could do so remotely; about three-quarters of     8     time, they agreed. When the answer, was no, she, declined the     9     （invite）. That approach brought Cobb's air travel last year down by 75%, and she plans     10    （continue） the practice. "It has been fairly rewarding. ", she says, "a really positive change."

I've always loved the ocean. In the    1     (seven) grade,I started volunteering at the Monterey Bay Aquarium in California. I was upset to learn that many sea animals eat plastic garbage,     2     (think)it is food.

I decided to do something     3     (educate) people about this problem. I held presentations at schools to teach kids about plastic waste. I wanted to reach businesses too. I decided that if I learned of a company    4     used a lot of plastic, I'd send it an email urging it to cut back.

One day, I saw a commercial for a health-care company. People in the ad were using plastic straws （吸管）.   I found the contact information of the company    5     emailed its president. I told him how     6     (harm) plastic could be to the environment and asked him to consider using more eco-friendly options. I was so    7     (excite) when he wrote back to me.He said he would make sure that the company cut its use of plastic straws in half.

I kept going. Whenever I heard of businesses using plastic, I'd send an email. One of the biggest companies I wrote to     8     (be) Alaska Airlines Paris. A company     9     (represent) wrote back and told me the airline was switching over     10     plastic to paper cups on all of its 1,200 daily flights.

There     1    (be) a dramatic rise in the number of extreme weather events over the past 20 years,    2    (cause) largely by rising global temperatures,according to a new report from the United Nations. From 2000 to 2019, there were 7,348 major natural disasters around the world,    3    (result) in USD 2,970 billion in economic loss．Much of this increase can be due to climate change. The findings show a critical need     4     (invest) in disaster prevention.

Sam is an in-real-life streamer（播主），and he live streams himself just going about his day．While riding his bike home     1     a cold night，he came across a sad-looking elderly woman wandering the streets by herself．The poor woman wasn't able to give him any information about     2     she lived．Sam walked her to a nearby convenience store so that she could     3    （safe） wait for the police to take her home．

Why do we dream？Scientists aren't completely sure,and they have diverse    1     (idea)．Dreams might be a side effect of memory making.When you sleep,your brain sorts through everything     2     happened during the day，trying to link new experiences to old memories.As it     3     (connect) things，your brain turns them into a story,and you get a dream．

It doesn’t impress like George Washington’s plantation on the Potomac, but Lincoln’s home in downtown Springfield, Illinois,     1     （prove）irresistible to visitors since it opened to the public. Beautifully restored（修复）to its 1860 appearance, the house was Abraham and Mary Lincoln’s home for 17 years. In 1844 they bought it     2     $1,200 and some land from Charles Dresser, who performed their     3     （marry）ceremony in 1842.

When the house was built, it was much     4     （small）than it is today. Mary’s niece wrote, “The little home     5     （paint）white.” It was sweet and fresh. Mary loved it. She was extremely pretty, and her house was a reflection of     6     （she）, everything in good taste and in perfect order.

Although Mary loved flowers,     7     she nor her husband was known as a gardener. A long- time neighbor said they never planted trees and only kept a garden for one year. Mary’s sister, Frances Todd Wallace, often came over     8     （plant）flowers in the front yard.

    9     Lincolns enlarged the house to a full two-story in 1856 to meet the needs of their growing family. Three of the four Lincoln sons were born here. After Lincoln was elected President of the US in 1861, they rented the house and     10     （sell）most of their furniture.