Mrs. Li is a teacher from Shenyang. She asked her students to hand in their homework through a QR code (二维码). "73. When students finish the homework, they keep it on WeChat. So I can check their homework everywhere using my computer or mobile phone." said Li.
"The paper is not easy to keep, but the code is easy to keep and share," Li said. 74. "It is worth trying to use new technology in education. Education itself is a kind of creation. 75. I don't want my students to fall behind the times."
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2.____________________
3.____________________
外面在下着大雨, 你最好待在家里。
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昨晚你玩的开心吗?
____________________?
罗马不是一天建成的。
Rome __________ __________ in a day.
她已经为自己的行为付出代价。
She has __________ __________ what she did.
在过去, 书籍全是手工制作的。
In those days, books were produced __________.