请从所给的十组对话中选择恰当的一组，并将其字母代号填在每小题相应情景图画下面的括号内。
()—Whose dresses are these? —They’re the__________.
() —When is your birthday? —It’s__________
()—I usually go there by train. —Why not__________ by boat for a change?
( )His family__________ all very kind and friendly. His family__________ a happy one.
( ) Because he is the tallest in his class,__________ he sits at the back of the classroom.
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