Answer:
join the ends of two pieces of metal or timber by notching them so they fit over or into eachother
Qué es eso? Yo estado hablando español durante años y nunca he visto esto
Fuimos is the answer.
There you go.
Yo hago mi tarea todos Los dias.
The conjugation is because it's "I". In Spanish when there is an "I"/ "yo", "o" usually is the proper form to use.
