用所给单词的适当形式填空。 1. He hurt his leg in a car _______ (事故) last year. 2. He _______(假装) not to see me when he passed by. 3. Let that be a _______(警告) to you. 4. The doctor said that he had a _______ (严重的) heart disease. 5. Be _______(小心) when you are crossing the road. 6. Look! They are _______ (decorate) the Christmas tree. 7. There is a dog _______ (lie) on the floor. 8. Brian was _______ (take)the hospital when he hurt. 9. Don’t be a _______(care) driver, or you will hurt others and yourself, too. 10. he went into the room _______(quiet), the baby is sleeping.