Select the most appropriate option to fill in the blank.

She swallowed ______ her breakfast in a hurry.

down

The most appropriate option to fill in the blank is down.

• "In" is used to indicate that something is inside something else. This does not make sense in the context of the sentence because the woman is not eating her breakfast inside something else.
• "Up" is used to indicate that something is moving upwards. This does not make sense in the context of the sentence because the woman is not moving her breakfast upwards.
• "Into" is used to indicate that something is moving into something else. This does not make sense in the context of the sentence because the woman is not moving her breakfast into something else.
• "Down" is used to indicate that something is moving downwards. This makes sense in the context of the sentence because the woman is swallowing her breakfast quickly, which could be interpreted as moving it downwards.