Transforma la ciguiente frase en frase interrogativa o negativas según se pide en la instrucción en tre paréntesis 1 you're at home this weekend (frase interrogativa) ​

1. in which sentence is the underlined portion a predicate nominative? for astronauts, going into space to repair orbiting equipment becomes a challenge. for astronauts, going into space to repair orbiting equipment becomes tricky. for astronauts, going into space to repair orbiting equipment becomes challenging. for astronauts, going into space to repair orbiting equipment becomes frequent.