Question

连词成句。
1. is,  this,  a,  pen  (.)
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2. spell,  you,  can ,  it  (.)
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3. dog,   the,  is,  black (.) 
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4. are,  how,  you, Tom  (?) 
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5.  afternoon, good,  Bob (.)   
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Answer 1

1. This is a pen.  
2. You can spell it.
3. The dog is black.  
4. How are you, Tom?  
5. Good afternoon, Bob.