题目

38. Li Ming, as well as some of his classmates, ______voluntary work now. A. are doing              B. is doing          C. do                        D. have done 答案：B1．请你根据下面的信息，寻找合适的量，写出这些量之间的比．王亮：我今年12岁，体重是42kg．陈玉：我今年9岁，体重是35kg．