Dear Grace,   

    Here is a photo of my ____. We are all at home now. And we are all ____. What are my grandparents doing? Oh, my grandfather is ____ chess. My grandmother is reading a newspaper. And my father is watching CCTV news. It is his favorite ____. My mother is cooking in the kitchen. What am I doing? I'm using the computer, ____ I'm not playing computer games. Haha, I am writing an e-mail to you.

Molly

澳门回归祖国的时间是（        ）

1978年底，邓小平作了题为《解放思想，实事求是，团结一致向前看》的重要讲话；1992年初，邓小平发表了《在武昌、深圳、珠海、上海等地的谈话要点》。这两次讲话都

X、Y、Z是3种短周期元素，其中X、Y位于同一主族，Y、Z处于同一周期．X原子的最外层电子数是其电子层数的3倍．Z原子的核外电子数比Y原子少1．下列说法正确的是（　　）