2 . Students are ________ (sure) about the new word’s pronunciation. They are looking it up in the dictionary.

3 . Don’t jump to conclusions. We’re still ________ (sure) of the new AI model Sora’s influence.

4 . If you are ________ (sure) about anything, just ask. No doubt leads to nothing.

5 . 我不能确定这件事是否值得去冒这个险。
____________________________________

6 . 根据句意，选用所给单词的适当形式填空。

sure          wide            India          serve          proud

1. This system is now __________ used by IT companies all over the world.
2. Don’t make a promise easily before you are __________ of something.
3. We take __________ in offering you the highest standards.
4. Sutong Bridge has been in __________ for years.
5. The South American __________ have been cooking and eating potatoes for well over two thousand years.

7 . If you are ________ (没把握) of the spelling of the word, look it up in the dictionary.

8 . With enough hard work, I’m ________ that I can do well in the coming competition.

A．nervous

B．unsure

C．confident

D．surprised