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    Changes in our lives（生活）are everywhere In the past（过去、以前），people wrote to each other.They had to spend（花费）a lot of time waiting for the letters.But now we can contact each other（互相联系）by phone and computer.We can use WeChat（微信）or QQ.It's quick（快的）and easy.
    In the past，we went to markets and shops to buy things.But now we like to buy things online（线上）.We can buy things at any time if we want to.Now，I am teaching my grandmother how to shop online.She can't walk very far so it will be easy for her if she shops online.
    In the past，the teaching tools（工具）were only chalk（粉笔）and blackboards.But now teachers use computers to teach students.Computers make study more colorful and interesting.Students can also do homework online.
（1）People spent lots of time waiting for the

letters

letters

in the past.
（2）People contact each other by

phone

phone

and computer now.
（3）In the past，people went shopping in the shops and

markets

markets

.
（4）If your grandmother can't walk far，it's

easy

easy

to buy things online.
（5）The teachers can use

computers

computers

to teach students.