根据句意和首字母提示完成单词。

1.I think Ding Zhaozhong is an o _______  scientist.

2.My aunt didn't go to the park. My cousin didn't go  there,e _______.        .

3. Bettina failed her test,so she was terribly u_______.

4. All students go to visit the Great Wall e_______Sam.

5.I have enough money to buy the computer,because it's  i_______.