I believe blew would be the verb.
The correct answer is identifying your audience.
The first thing you need to think about when starting your writing is your audience - the people you are writing for and want to read your work. Based on your audience, you will know whether you need to be more or less formal, you will decide on your language and choice of words, your tone, topic, etc.
Answer:
at
Explanation:
It is most likely at but all of them gramatically make sense but not physically.
For example, you cannot stand in a door but the sentence is correct.
Standing on a door is quite strange but the sentence itself makes sense
