Question

2. All humans,however,need a basic minimum of two litres of water in food or drink each day,and for this there is no         .

   A. insurance   B. substitute

   C. allowance   D. competence

Answer 1

2. B句意为："无论如何，一个人每天最少需要从食物和饮料中获取两升水，这个基本需求没有任何别的替代方式。"substitute意为"替代，替代品"，符合题意。