单选题 Sue is now 10 years younger than Jane. If in 5 years, Jane will be twice as old as Sue, how old will Sue be in 3 years?
(A) 6 (B) 8 (C) 11
(D) 14 (E)18

【正确答案】 B
【答案解析】[解析] 设Sue现在的年龄为x，则Jane现在的年龄为x+10，根据题意可得：
2(x+5)=(x+10)+5→x=5岁，
所以三年以后Sue将是5+3=8岁。