根据句意及首字母提示在横线处填上恰当的单词，使句子意思完整，语法正确。 1. If you want to drive a car, get the drive's l______first, please. 2. It was s______ of you to believe in him.  He is not an honest man. 3. My brother has been a Party m______ for ten years.He joined the Party when he was a college student. 4. We want some v_____ to help the old man. 5. We should know the i_______ of studying hard, or we can't get good grades in the exams. 6. We need to conccntrate more on our s________ than other things if we want to get good grades. 7. At p _____ pollution is a serious problem.  We should do something to protect the environment. 8. Do you have any e_______ in keeping a pet? I think it's hard work for me. 9. It's easy for us to be s_________ in summer because it's too hot. 10. No one knows the r_______ to this question.  It's too difficult. 11. we all hope that we can a_________our dreams by working hard.