根据所学知识，找出下列历史结论的证据。

A、半坡原始居民已经定居生活了：__________________________________________________________。

B、河姆渡原始居民已吃上米饭了：__________________________________________________________。

C、山顶洞人已懂得爱美了：________________________________________________________________。

D、大汶口原始居民里出现贫富分化了：______________________________________________________。

E、我国原始社会时期已经用船作为交通工具了：______________________________________________。

用括号内所给动词的适当形式填空

1. You mustn't come into the room if you              ( not invite) .

2. Tom always goes to her Math teacher for help when something            (worry) him.

3. Look! The river _______________(rise) two feet because of the heavy rain.

4. In the old days the working people in our country ____________ (look) down on.

5. Which dirty blanket ____________ (wash) first is not decided yet.

6. The doctor helped the man by _______________(operate)on him.

7. Why can't you just believe me? I ______________ (tell) you everything I know!

8. —Do you still remember that we first met in the library one year ago?

    —Of course. You            (read) a comic book then.