第28题: [单项选择]The size of the workforce declines when ______. A. many people reach the retiring age B. the birth rate falls rapidly C. the number of retirees exceeds that of new workers D. the death rate increases 参考答案:C 答案解析:本题属于细节题,在文章第三段可找到正确的对应。
第35题: [单项选择]Why shouldn't we use the garden, ______ A. weather permitting B. weather permitted C. weather permits D. weather having been permitted 参考答案:A 答案解析:此题考查独立结构作状语的用法。