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Practice Listening: Select Missing Word ID: #4178 Short Battery
Instructions ›
You will hear a recording. At the end of the recording the last word or group of words has been replaced by a beep. Select the correct option to complete the recording.

Transcript:

He and his team have indeed designed a battery-free phone. It looks like a circuit board, with touch-responsive numeric buttons. And it runs on just a few microwatts of power, which it harvests from light, and from the radio signals eminating from a nearby wireless base station. The team achieved the battery-free, energy-efficient design by ditching two of the power-hungry features of modern cell phones. One, the test unit skips digital to analog conversion. And two, it does not generate its own wireless signals to make calls. Instead, in receiving mode, it absorbs incoming radio waves from the base station, and converts them directly into vibrations of its speaker. In sending mode, it uses the vibrations of its on board microphone to change the way radio waves are reflected back to the base station. And it worked - to make a skype call.
* Click on the correct answer

Result:

AI explanationShows the answer. Tap to open.
Option 4: "to make a skype call"

Explanation: This option is correct as it directly reflects the conclusion of the text, which states that the phone successfully worked 'to make a skype call.' This aligns perfectly with the overall theme of the text, showcasing the innovative functionality of the battery-free phone.

Option 1: "in draining a battery"

Explanation: This option is incorrect because the text discusses a battery-free phone that does not rely on a battery at all. The phrase 'in draining a battery' contradicts the main idea of the text, which emphasizes energy efficiency and the absence of a battery.

Option 2: "in recharging a battery"

Explanation: This option is also incorrect as the text explicitly states that the phone is battery-free. Therefore, the concept of 'recharging a battery' is irrelevant and contradicts the core message of the text.

Option 3: "to take a call"

Explanation: While this option may seem plausible, it is incorrect because the text specifically mentions making a Skype call, which is a distinct action that involves internet communication rather than traditional phone calls. Thus, it does not align with the context provided.

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