Làm và giải thích giúp mình với ạ💜 1. The problem is very difficult. It seems to be ................... A. solve B. solvable C. unsolvable D. solution 2. I wish to thank my many ..............., who were there when I needed them. A. supportive B. support C. supporters D. supports 3. These quick and easy ...........................will help you understand the lesson. A. A. solve B. solvable C. unsolvable D. solutions 4. In my free time, I often help mom with .............. the house. A. clean B. clean C. cleaning D. cleans 5. He usually wears sandals but today he __________ boots. A. is wearing B. wears C. was wearing D. practiced