Complete the sentence with appropriate word: Poly ran fast lest she ___ miss the class.

Explanation: Lest এর ব্যবহার:
- Lest একটি conjunction & এর অর্থ হল 'পাছে/যাতে না'.
- মূলত এটি negative অর্থে বাক্যে ব্যবহৃত হয়ে থাকে।

Structure: Independent clause + lest যুক্ত Dependent clause.
অর্থাৎ, subject + verb + other words + lest + subject + (should/might) + base form of verb + other words.
 
Example:
1. I uttered the word repeatedly lest I should forget it.
2. Walk slowly lest you should fall.
 
SOURCE: Advanced Learners Communicative English Grammar and Composition With Solution (For Class 9-10)