如图,已知∠1 = 70º,如果CD∥BE,那么∠B的度数为( )
A:70º
B:100º
C:110º
D:120º
①缓解养老负担 ②缓解人口老龄化 ③增加劳动力人口 ④缓解环境压力
How old was Tony when he finished school?