根据句意和首字母填空。 1. It's too dark. It is time for us to l________. 2. He l________ Dalian f________ America. 3. —Where's your father? Does he l________ Changchun? —No. But he is l________ for Tibet. 4. My uncle is a farmer, he lives in the c________. 5. I love n________ , because it makes me enjoy n________ air. 6. You are on duty. Don't f________ to clean the classroom. 7. I s________ an hour on my homework.