Premise:
"The villagers are worried."
Hypothesis: The villagers were worried about their futures.

it is not possible to tell

Premise:
"The northeastern section of France offers everything from high coastal dunes and peaceful rolling farmland to picturesque mountains, forests, and vineyards."
Hypothesis: There are many different kinds of landscape in the north-east of France.

yes

Premise:
"Now at last, I had Poirot to myself, and could relieve my still burning curiosity. "
Hypothesis: I had no curiosity at all.
no