I agree with your opinions on Questions 1 and 2, but I think you may forget to verify your answer “No, I do”>>> “No, I don’t” and “Yes, I does”>>>“Yes, I do”
2. I think your solution of how to use resources efficiently in Question 3 is effective, because you showed the way how to use resources efficiently illustratively. I understand your answers clearly, but your answer isn’t correct following grammar. You can learn basic grammar from books or internet. In addition, other resource is another way to search information efficiently such as movies or instructional CD. Besides, your answer 3 consists of more than 50 words. However, I like your answer especially answer 3.It shows your wide idea.