Answer:
for
They have not finished their meal yet
What has she made for lunch?
J.ulia and I have studied at Tancredo de Almeida Neves
I have already wrote the response.
Step-by-step explanation:
1) "for" is used to denote an interval of time, while "since" is used for emphasizing an event or a date in the past when something happened.
2) In Present Perfect Tense, adverb "yet" is usually placed at the end of the sentence. Other localizations may be accepted, depending on the context, but this is the most common usage.
3) Since the subject is "she" then we use the form "has". Also, the correct phrase is "making lunch", not "doing lunch" so we use past participle of the verb "make" which is "made".
4) Subject of the sentence is "J.ulia and I" which is first person plural, so we use the auxiliary verb "have". Option 3 is incorrect because the adverb "already" should go between the auxillary and the main verb.
5) Present Perfect Tense is formed from the auxiliary verb "have/has" and the past participle of the main word. Past participle of the verb "write" is "written", so the option 2 is incorrect