What is the sentence that expresses the main idea 1) To erase or not to erase? (2) That is the question in many students’ minds after they've penciled in one of those small circles in multiple-choice tests. (3) Folk wisdom has long held that when answering questions on such tests—or on any test—you should trust your first instincts. (4) However, a research instructor has found that students who change answers they’re unsure of usually improve their scores. (5) The instructor spent three years compiling and analyzing college students’ tests, watching for telltale erasure marks, which would indicate that the student had, indeed, revised his or her answer. (6) What the instructor found was that revised answers were two-and-a-half times as likely to go from wrong to right as vice-versa. (7) This statistic held up even across such variables as sex, age, and race; the subject matter of the tests studied also proved not to be a factor.

Which two parts of this excerpt from mary shelley’s frankenstein reveals information about the setting? (it was on a dreary night of november that i beheld the accomplishment of my toils.) with an anxiety that almost amounted to agony, (i collected the instruments of life around me, that i might infuse a spark of being into the lifeless thing that lay at my feet. it was already one in the morning; the rain pattered dismally against the panes, and my candle was nearly burnt out) when, by the glimmer of the half-extinguished light, i saw the dull yellow eye of the creature open; it breathed hard, and a convulsive motion agitated its limbs. (how can i describe my emotions at this catastrophe), or how delineate the wretch whom with such infinite pains and care i had endeavored to form? his limbs were in proportion, and i had selected his features as beautiful. beautiful! great god! (his yellow skin scarcely covered the work of muscles and arteries beneath; his hair was of a lustrous black, and flowing; his teeth of a pearly whiteness; ) but these luxuriances only formed a more horrid contrast with his watery eyes, that seemed almost of the same color as the dun-white sockets in which they were set, his shriveled complexion and straight black lips.