3 . New Caledonian crows are well-known for using different types of tools for preying (捕食) from tree holes and other hiding places. While they firmly hold their tools in the bill, they need to put them down to eat. This is when crows are at risk of losing their tools by accidentally dropping them or having them stolen by other crows.

In an earlier study, researchers in the UK had discovered that crows keep their tools safe when not needed, using one of two “safekeeping” strategies—they either securely hold them trapped underfoot, or temporarily put them into a nearby hole or behind bark. But are crows more careful when handling particularly valuable tools?

“Many of us will fuss (大惊小怪) about a brand-new phone, making sure it does not get scratched, dropped or lost. But we may handle an old phone with a cracked screen quite carelessly,” said lead author Barbara Klump from the Max Planck Institute of Animal Behavior, Germany.

Crows at one of the team’s long-term study sites use two different kinds of stick tools: complex hooked tools and basic non-hooked tools. The former are painstakingly crafted from a relatively scarce plant species, while the latter are simply twigs (细枝) sourced from the forest floor. “Hooked tools are not only more costly to obtain, but they are also much more efficient,” explained Barbara Klump. “Depending on the foraging (觅食) task, crows can get prey with these tools up to ten times faster than with non-hooked tools.”

In their new study, the researchers now discovered that New Caledonian crows are more likely to keep valuable hooked tools safe between uses than the more basic non-hooked tools. “It was exciting to see crows are just a bit more careful with tools that are more efficient and more costly to replace. This suggests that they have some conception of the relative value’ of different tool types,” noted study co-author James St Clair.

This is the first study to investigate how animals handle and store tools of different kinds, providing a new way to measure how much they value these objects.

1. Why are phones mentioned in paragraph 3?

A．To indicate the necessity of phones in our daily life.

B．To emphasize people’s attachment to their old devices.

C．To stress the similarity between humans and crows.

D．To show people’s improper attitude to old things.

2. What’s the main advantage of a hooked tool?

A．It can be gotten easily.	B．It can be adjusted freely.
C．It can make crows’ foraging more productive.	D．It can prevent crows from danger.

3. What excited the researchers about the New Caledonian crows?

A．Their secret hiding places.	B．Their unusual eating habits.
C．Their creation of complex tools.	D．Their treatment of valuable tools.

4. Which can be a suitable title for the text?

A．Crows Use Strategies to Gain Valuable Tools

B．Crows Learn to Use Special Tools for Preying

C．New Discovery of How Crows Make Tools

D．New Caledonian Crows Keep Favorite Tools Safer

6 . 假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者(从第11处起)不计分。

Have you wondered how your body knows when to wake up or why you need the toilet less at night? Influencing by light, body clocks use the sun to help your body to run on time. They repeat every 24 hours and almost every living thing has them. When the sun shines across the window in the morning, your body clock tells you it’s time to wake up. When it’s dark, your body feels sleepy. Not listening to your body clock, such as by going to bed late can mess up your sleep cycle, that makes you tired the next day. Scientists have found body clocks help our whole body run smooth. The Sleep Charity, which helps people to sleep better, recommend sticking to regular sleep patterns. So you’re a night owl who stays up late or a morning lark who likes to get up early, try going to bed and get up at the same time every day. It also suggests getting lots of natural lights in the morning. Even if the sky is cloudy and grey, this can reset your body clock and make you to feel more awake.

7 . 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。

In Xixian county, located in Linfen, Shanxi province, a smart pear orchard (果园)     1     (stretch) 33.3 hectares (公顷) has been developed with the     2     (assist) of the Shanxi Academy of Agricultural Sciences.

In this orchard, every pear is given     3     unique QR code that enables monitoring of the entire growth process. “The QR code serves     4     an ID card, recording the life of a pear,” said Wang Yibo, an agriculture official from the county.

    5     (establish) in 2020, the smart orchard is operated with the help of cutting-edge technologies such as the internet, big data, cloud computing and the internet of things. There are 64 villages in the county     6     rely on pears as their primary industry,     7     (account) for 80 percent of the farmers’ income.

So far, Xixian     8     (build) a smart agriculture integration platform made up of 12 systems, including water-fertilizer     9     (integrate) management, disease and insect monitoring, and the monitoring and evaluation of the quality of the land.

According to Wang, the platform not only helps with production but also promotes sales, as its tracking system can collect first-hand marketing feedback data. Pear farmers can learn about the market demand through the system to     10     (accurate) identify their customers and carry out targeted promotions.