根據(jù)例句補全下列句子。
1. Why is she crying? 
Because she hurts her finger.
2. ____________ is ____________ quiet? 
B____________ she ____________ reading a ____________.
3. ____________ are ____________ happy?
B____________ they ____________ playing ____________.                                     
4. Why is he ____________?
____________ it is rainy.
2. Why, she, Because, is, book
3. Why, they, Because, are, football     
4. wet, Because
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