Question 17: ________ between the two attacks, the commander tried to

Question 17: ________ between the two attacks, the commander tried to prevent the enemy troops

• A. Without delaying – to gather
• B. By not delaying – from gathering
• C. In delaying – for gathering
• D. Having delayed – without gathering

+ Căn cứ vào: “prevent sb from sth”: ngăn cản ai làm gì. 

+  By + Ving/N: bằng cách làm gì/bằng cách gì