Parents with large families ask fewer questions at dinner because 。
A. they are busy serving food to their children
B. they are busy keeping order at the dinner table
C. they have to pay more attention to younger children
D. they are tired out having prepared food for the whole family
正确答案：B
文章第二段提到conversationgiveswaytotheparents’effortstocontroltheloudnoisetheymake故正确答案应该选择B
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