阅读下面短文。根据以下提示：1)汉语提示，2)首字母提示，3)语境提示，在每个空格内填人一个适当的英语单词，并将该词完整地写在相对应的横线上。所填单词要求意义准确，拼写正确。

As children，loving our parents is an important part of life. It is our parents who create us，小题1:       (抚养)us，make us who we ale and keep a roof over our heads in all kinds of weather．Here are some ways to love our parents

Firstly, tell them we love them every day．A gentle“I love you”will小题2:w       a coldest heart．Parents brought us into this world 小题3:         them，we might still wander at an unknown corner of an unknown world .Then，show小题4:      (尊敬)to them and don’t get angry easily because anger helps小题5:         us nor our parents．Instead，keep小题6: c        and sometimes share our feelings with them．Besides，obey their requests，小题7:       will make our attitudes better．

What’s more，understand that parents should be小题8:f        when they make mistakes. We should

also keep company with them as much as小题9:p       . Learn from them by listening to their stories as parents are the小题10:         of our growth and even our teachers in one way or another．

月球与地球质量之比约为1：80。有研究者认为月球和地球可视为一个由两质点构成的双星系统，它们都围绕月地连线上某点O做匀速圆周运动。据此观点，可知月球与地球绕O点运动的线速度大小之比约为[     ]

A．1：6 400

B．1：80

C．80：1

D．6 400：1