题目内容：

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

The world’s first hamburger doesn’t come from where you think it comes from. It wasn’t invented in the United States, nor 1. (do) it originate in Germany. It really comes from China.

Chinese hamburgers are very real and they predate 2. hamburgers we call our own in the U. S.. 3. (know) as rou jia mo, which translates to “meat burger” or “meat sandwich”, they consist of chopped meat inside a pita-like bun（小圆面包）, and they 4. (be) around since the Qin dynasty, from about 221 BC to 207 BC.

The rou jia mo originated in Shaanxi province of China, and is now eaten all over the country. It’s 5. (typical) prepared and eaten on the street. The dough for the mo consists of a simple 6. (mix) of wheat flour and water. Of course recipes may vary, 7. this basic practice is almost the same. It 8. (look) a little like a Chinese steamed bun or baozi.

The meat filling might consist of chopped pork, beef or chicken 9. has been cooked with a variety of spices. You might also find greens like lettuce（生菜）10. (decorate) the sandwich.