Do not worry, English grammar is not-to understand. Which of the following best fits in the blank space

so difficult

very difficult

too difficult

difficult enough


Description (বিবরণ) :

প্রশ্ন: Do not worry, English grammar is not-to understand. Which of the following best fits in the blank space

ব্যাখ্যা: Too + adjective (difficult) + to + present form of verb (understand)