有问必答。给下列的问句选择合适的答语。 ( ) 1. Why is he quiet? ( ) 2. Why do you wash your hands? ( ) 3. Jenny, why do you draw a circle? ( ) 4. Why don't you go outside? ( ) 5. Li Ming, why do you wear your boots? A. Because they are dirty. B. Because I'm tired (累). C. Because he's reading a book now. D. Because my favourite shape is a circle. E. Because it's raining outside.