What does Dr. Mesmer claim? He has discovered an invisible force that can cure sickness.
He can make a balloon float on air high above the ground.
He has proven that lightning is the same as electricity.
He can touch a flame to an invisible gas and make it burn.

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.

answer: go in to it prass it and you should see a delate singe

explanation:

there is no paragraph seven here.