题目

Paul did a great job in the speech contest. He many times last week. A . need have practised B . might practise C . must have practised D . could practise 答案：C根据下图判断，四地中按水资源、土地资源、太阳能资源和海盐资源最丰富来排序，正确的是 A．③②④①                           B．①③②④ C．③④②①                           D．②①③④