1. The closest meaning to "fit" is **D. unfit** (since "unfit" is the opposite of "fit", it suggests a lack of fitness, which aligns with the general negative context of "unfit"). However, in the context, "fit" means healthy or in good shape, so you might need to reconsider wording or available answers.

2. The closest meaning to "old" is **D. older** (which directly relates to age).

So the answers are:
1. D
2. D