English strange question, come in and tell me why.

1. Going to the photo studio is, of course, inviting photographers to take pictures. Taking a picture of her is taking a picture of yourself, because it is a verb-object subject-predicate structure, which means taking the initiative, that is, the action happens by itself ~ don't choose according to the meaning of the question.

I didn't expect it to be so good! Adverb as means "so" and "so", which is equivalent to so. No other translators can do it.

The subject can be either a person or a thing. No one can do this usage. I can only say that someone is likely to do something.

The end of last month was an instant, that is, the time point. Since+time point means since ~ ~, that is, from which moment in the past to the present. Tense is usually the present perfect tense. How long have you been here? This is a question of the present perfect tense. Select it. How long have you been there? From the end of last month to now.

At+ time means in ~ ~. By+ time means until ~ ~ ~. If this sentence is by, it should be the past perfect tense. How long have you been here?

For a while, not for a while. For example, in three days (three days later).

Serve, be used as. For example, this room can be used as a meeting room.

And the service itself has been "for". . . Serve means to serve someone.