1. Leave it to Carlos to think of a(n) solution to our most difficult problem! Your answer Correct answer ingenious ingenious 2. For me, the biggest to becoming an astronaut is my poor math skills. Your answer Correct answer obstacle obstacle 3. I have no idea how much time since she leftI fell asleep. Your answer Correct answer elapsed elapsed 4. After college, I travelled through Europe, and the most thing I saw was the Eiffe