问题
选择题
Helping others is a habit, _______ you can learn even at an early age.
A．it
B．that
C．what
D．one
答案
答案：D
搜题请搜索小程序“爱下问搜题”
Helping others is a habit, _______ you can learn even at an early age.
A．it
B．that
C．what
D．one
答案：D