Who is the writer of "THE OLD MAN AT THE BRIDGE".​

Which evaluation category receives the highest rating? which evaluation category receives the lowest rating?

Why does the green knight laugh at their response

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.