①禹的儿子启凭借家族的势力，继承了禹的位置，建立夏朝，标志着____制的产生。

②西周初期，为了巩固疆土，周王将土地分给宗亲和功臣，建立诸侯国，史称____制。

③为加强对全国的统治，秦始皇在地方上建立了由中央直接管辖的____制。

庆祝中秋节

    It is the Mid—Autumn Day today. My grandmother, parents and neighbours are celebrating the festival together. We are eating delicious moon cakes in the garden. And we are enjoying the beautiful round moon. We are also drinking Chinese tea. We are very happy.

用所给单词的正确形式填空
Don’t forget ____ (bring) your kite when you go for a picnic
I didn’t see Tom yesterday, but Liu Ying ____ (see) him yesterday afternoon.
How many ____ (potato) did that woman buy?
We like our English teacher, because he is very ____ _(friend) to us.
Linda decided ____ (order) some Chinese food.

根据句意及首字母提示完成单词。 
It's too hot,  we need to drink more w____. 
Mr. Black looks u____ ,  but he is a really good man. 
—How is the salad?  —Very d____.
—Where is the post office?   —It's at the c____ of the street. 
The movie Avatar is great.  We d____to see it again.