语法与词汇25.While researchers may not______the expansive claims of hard-core vitamin enthusiasts, evidence suggests that the nutrients play a much more complex role in assuring vitality and optimal health than was previously thought.
【正确答案】
D
【答案解析】本题空格处是说研究者没有支持那些顽固的维生素狂热者。D项“endorse在(票据)背面签名，正式赞同或支持”符合题意。如：The application was endorsed by the governors’board．(申请书已由董事会批准。)其他三项“authorize批准；license许可，特许；counteract抵消，阻碍”都不正确。