186.adv. exactly; accurately; definitely; certainly; surely

　　(a) perhaps

　　(b) good

　　(c) consciously

　　(d) precisely

　　187.adj. pertaining to the commercial center of a city

　　(a) downtown

　　(b) yearly

　　(c) beneficent

　　(d) compatible

　　188.adv. simply; in an unembellished manner; clearly

　　(a) plain

　　(b) smoothly

　　(c) tight

　　(d) drastically

　　189.adv. after all others; finally; at the end; most recently

　　(a) last

　　(b) plain

　　(c) entirely

　　(d) miserably

　　190.adv. sturdily; steadily; assertively; in a determined manner

　　(a) last

　　(b) firm

　　(c) ahead

　　(d) certainly

　　正确答案：aaab