We were PRETTY disappointed with the quality of the food A. highly B.

We were PRETTY disappointed with the quality of the food

• A. A. highly
• B. B. rather
• C. C. extremely
• D. D. very

Giải thích: We were pretty disappointed with the quality of the food. (Chúng tôi khá thất vọng với chất lượng thực phẩm.) 
A. highly (adv.): cao    

B. rather (adv.): khá, hơi 
C. extremely (adv.): cực kỳ  

D. very (adv.): rất 
Vậy pretty có nghĩa tương đồng với phương án B.