题目

我国有四大工业基地，其中位于我国东北地区的是（ ） A . 京津唐 B . 珠江三角洲 C . 辽中南 D . 泸宁杭 答案：C       He _______ cards with his friends, but now he _______ a walk after supper.        A. used to play; is used to having  B. is used to playing, used to have        C. used to play; is used to have     D. is used to playing; is used to have