题目内容：

    Apple has filed a patent for ''a wearable electronic ring'' that could let you control your other devices (设备) without touching them. The file includes drawings of the potential design and lists intend functions like a rechargeable power source (电源). The ring is designed to be worn on one finger and doesn't appear to be a stand-alone product. Instead, it aims to improve the user experience of bigger devices like iPhone and iPad. Apple also throws attention onto the potential safety functions of the ring by stating that the light given off by some touchscreen devices could be ''inappropriate in certain social environments or even dangerous if it gives away the position of a user who is in danger''.

The tech giant (巨头) explains in the patent that touchscreen devices we are using now can be seen as ''burdensome, inconvenient, or useless for certain tasks and applications''. It suggests that holding an iPhone or iPad for too long could tire some users and obviously, Apple can’t ignore such situations! It says the Apple Ring could be a more effective way to control those devices from a distance.

Apple isn't alone with this ''smart ring'' idea.

Amazon recently put the Echo Loop on the market, a smart ring that uses Alexa. The device is similar to the smart speaker but is worn on your finger instead. It’s currently only available in the US and has an introductory price of $129. 99 (￡100). Google recently presented its Pixel 4 smartphone and one of the top new functions is called Project Soli, which provides a '' Motion Sense'' effect. It lets you control the Pixel 4 without actually touching it. You can wave your hands in the air to pause or skip songs, alarms and phone calls, and more.

As with all patents, we can’t know for sure if Apple is going to bring out a smart ring device until official word is given.

1.What can Apple's smart ring do potentially?

A.Work as a mobile phone.

B.Charge itself automatically.

C.Promote users own security.

D.Stop viruses attacking phones.

2.What made apple develop the wearable product?

A.The drawbacks of its touchscreen devices.

B.The huge marketing potential of touchscreens.

C.The fierce competitions from across the country.

D.The introduction of other companies’ technology.

3.What do we know about the Echo Loop?

A.It's popular with users.

B.It's under development.

C.It's not sold internationally.

D.It's not accepted by Apple.

4.What is the best title for the text?

A.The Tech Firms' Smart Rings

B.Apple's New Device Patent

C.The Future of Touchscreen Devices

D.New Technologies, New Products