Selina is a fifteen (1) y_____ -old girl. She is very careless (粗心的). So her parents often 
(2) t_____ her to do or not to do something,     
     One day, when Selina came home, she (3) f_____ a 100-yuan bill (钞票) on the table in the 
(4) d_____ room. "How great!" she said to herself. "l am surprised that Mom gives me so (5) m_____ 
money today. "But when she took up the bill, she found there was a piece of paper (6) u_____ the ill. 
On the paper it reads:  
Dear daughter:    
     It is your grandmother's (7) b_____  today, Please stay at home and (8) w_____ for us. We'll go 
to your grandmother's home. (9) B_____  remember: this bill is not for you. I put it here in order to 
attract you. Please (10) p_____  it where it was after you read the paper.

1. Your trousers are d_____. You must wash them.
2. Have you seen my pen? I can't f_____ it.
3. We usually have three m_____ a day.
4. S_____ is the best season for planting trees.
5. We listen with our e_____.
6. Fifteen and twenty-five is f_____.
7. It often s_____ in the north of China in winter.
8. —Have you ever been to Xi'an?
     —Yes, I have been there t_____.