Although his experiments were designed to support the ideas       the influence of environment upon plants, Mendel found that many characteristics were passed on from one generation to the next.

When I arrived I saw the place was already ______ by two strangers in uniforms.

Doctors          the old man not to smoke so much, but he just couldn’t give it up.

Near the table ________ a poor dog, who desired to satisfy his hunger with ________ fell down the table.

She ______ behind the door in order not to be found. Two minutes later she was safe again.