Listen and fill in the blanks. 听录音，把句子补充完整。（写阿拉伯数字） 
1. Our lucky number is____  . 
2. -How old are you?
    -I’m___  . 
3. -How many pens?
    -        pens.
4. Show me         and____.
1. 8      2. 12      3. 13      4. 11      15
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