阅读下面短文, 在空白处按要求填入适当的单词或括号内单词的正确形式。
Hi, my name is Zhao Shuo.____(this)are my two good friends:Qian jing and Tu Yue.We all like sport____(连词)we play football on Saturday.
My father is____(冠词)teacher at our school. Their fathers are____(policeman). Dogs can help their work. This is my father's dog.____(it)name is Xuanfeng.
Z（g），经60s达到平衡，生成0.3molZ。下列说法正确的是：（ ）