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.