He absorbed himself so entirely to his research that ____he made himself ill.

Most of the evidence was destroyed in the fire. ______, it would be almost impossible to prove Jim guilty.

The story of the movie is a lot different from what I know g so I guess it is just      based on the original novel.

--- The earthquake last night was really terrible. --- ______, no people were injured or killed, and they escaped in time.

Chemical pollution will bring about a threat to agriculture and food chain, and ________ to human health.