单项选择题 A pilot would be most （）, if, on hearing of imminent bad weather, he sent forth a distress signal at a time too（）to ascertain the reality of the danger.

单项选择题 Transgenic mammals that secrete monoclonals in their milk can generate one gram of antibody for roughly $100—one third the price of traditional production methods, most scientists agree, but still too expensive to be （）

单项选择题 Roger's understanding of the pointillist technique is profound, albeit thoroughly（）; there are few who can （） his talent, recognized often and justly, for understatement and economy in the use of color.