问题描述：
填空,并说明其原因
1.Helen's shoes( )green.
2.( )is this shirt? It's 50 yuan.
3.( )the desk. Can you see a computer on it?
4."Do you have a pen friend?""( )!"
1.Helen's shoes( )green.
2.( )is this shirt? It's 50 yuan.
3.( )the desk. Can you see a computer on it?
4."Do you have a pen friend?""( )!"
问题解答：
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