--instructions--

Listen to the audio and complete the sentence below.

--fillInTheBlank--

--sentence--

BLANK and BLANK are important, but we also need to think about BLANK and BLANK.

--blanks--

Security

--feedback--

This word refers to protection and is used as an uncountable noun when speaking in general.

cost

--feedback--

This word means the amount of money required, and it is used as an uncountable noun when talking generally.

speed

--feedback--

This word describes how fast something is. It's used here as a general concept.

growth

--feedback--

This word refers to progress or expansion, and it is used as an uncountable noun when talking generally.

--explanation--

In this sentence, the nouns security, cost, speed, and growth are used in a general, abstract way.

You don't use articles like the or a with uncountable or abstract nouns when you talk about them in general terms. For example:

• Security is a big concern. - Here, you talk in general.

• The security of this building is very strict. - It's a specific case, so the is used.

--scene--

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      "filename": "B1_20-1.mp3",
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      "startTimestamp": 33.88,
      "finishTimestamp": 37.86
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