Answer:
The correct answers are He llegado aquí and He venido a cortarlas.
Step-by-step explanation:
We use the perfect past of the indicative to express a situation that has already been finalized, but which extends to the present. Or to express a situation that has already been finalized but will bring a consequence in the future or in the present. 
As in English, to form the perfect preterite in Spanish we will use the auxiliary verb haber + past participle.
Yo he llegado / Yo he venido 
Tú has llegado/ Tú has venido 
ÉL/Ella han llegado/ Él/Ella han venido 
Nosotros hemos llegado/ nosotros hemos venido 
Ustedes han llegado / Ustedes han venido. 
Therefore, the correct options are He llegado aquí and He venido a cortarlas.