单选题 With high hopes, the company sent samples of the substance to scientists, but they couldn't ______ any practical uses for it.
A. come up with B. do justice to C. get even with D. look up to

【正确答案】 A

【答案解析】[解析] 本题空格处是说科学家们对它提不出任何实用之处。A项come up with“赶上，提出”符合题意，如：He couldn’t come up with an appropriate answer just at the time．那时他想不出一个合适的答案。其他三项do justice to“公平对待，适当处理”；get even with“报复”；look up to“尊敬，仰望”都不正确。