Adjective or adverb?

Choose the best option: "The old man sitting in the chair looks ...." (calm / calmly)

Choose the best option: "Seven is a bit early. Can't we get a ... train?" (later / laterly)

Choose the best option: "I've been working ... to improve my English." (hard / hardly)

Choose the best option: "He was looking at me ...." (strange / strangely)

Choose the best option: "You can buy a season ticket if you are a ... visitor." (frequent / frequently)

Choose the best option: "..., nobody was injured in the accident." (lucky / luckily)