it's more () to climb that mountain.We must be careful.A,easier B,busier C,most busy D,busiest
问题描述：
it's more () to climb that mountain.We must be careful.A,easier B,busier C,most busy D,busiest
答
B more后面应该加比较级,所以CD排除,后面说We must be careful,所以不可能是更容易即A排除,所以是B