--description--

The word on is a preposition that you can use to talk about specific days of the week, dates, and parts of the day (only when you mean a specific day) when something takes place. For example, on Tuesday, on July 4th, or on Friday night.

In this case, Sophie uses it to say exactly when the team meetings are scheduled.

--questions--

--text--

What does Sophie say about the team meetings?

--answers--

We have meetings on Monday mornings.

We have meetings at Monday mornings.

--feedback--

The preposition at is not usually used with days.

We have meetings in Monday mornings.

--feedback--

You don't use in with days of the week when talking about schedules.

We have meetings by Monday mornings.

--feedback--

By indicates a deadline, not a regular meeting time.

--video-solution--

1

--scene--

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        "character": "Sophie",
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    "audio": {
      "filename": "1.3-4.mp3",
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      "dialogue": {
        "text": "Yes, they do. We have meetings on Monday mornings.",
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