请问It's our

it's our duty to protect our environment/是什么意思请问 it's our duties "It's good for our It's Our Love 歌词 It's()to()()our classroom. it's our last shot如何翻译 It's tome ___(begin)our meeting. It's our school h____ s____. It's time to build our life it's time（）begin our class. Chinese,for,lesson,it,s,our,ti It’s good for our health .