--instructions--

Listen to the audio and complete the sentence below.

--fillInTheBlank--

--sentence--

There's been a lot of BLANK and BLANK on what should be included.

--blanks--

back

--feedback--

This is part of an idiomatic expression that means moving in two directions repeatedly.

forth

--feedback--

This pairs with back to describe movement or discussion in two directions.

--explanation--

Idiomatic expressions are phrases whose meanings are different from the literal meanings of the words. They represent common ways of speaking that often cannot be understood just by looking at each word.

Back and forth is an idiomatic expression meaning a repeated movement or exchange between two points or ideas. In the dialogue, it means ongoing discussion with different opinions or ideas shared repeatedly. Another example:

There was a lot of back and forth between the team members before deciding on the design. – This means the team members discussed many times before reaching a decision.

--scene--

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    "audio": {
      "filename": "B1_24-1.mp3",
      "startTime": 1,
      "startTimestamp": 4.6,
      "finishTimestamp": 7.36
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