If $H_{1}(M)$ is finite then by the universal coefficient theorem, $$H^1(M) \cong \hom_{\mathbb{Z}}(H_1(M), \mathbb{Z})$$ is zero (because $\mathbb{Z}$ has no nonzero elements of finite order).
And by Poincaré duality (the manifold is connected, closed, and orientable), there is an isomorphism $H_{n-1}(M) \cong H^1(M)$.