先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    Bill and Josh are brothers.This1Bill says，"Josh，it's 4:30.Let's go on a picnic(去野餐).""That2great to me，"says Josh? "I want to eat some bread and drink (喝) some3,but we must4Mom about it."

    Bill goes to his mom for it.Mom says，"I'm sorry.Bill.I'm busy cooking(做饭)dinner5our family."Bill says， "That's OK，Mom."Then he goes into6room and says to his7 ， "Josh， we can't go on a picnic.Mom is busy."

    Then Mom comes to the brothers'8."Bill and Josh，how about9a picnic' on a blanket by a sunny window(在暖洋洋的窗边的毯子上)'?"She asks."Great! Mom!" say the brothers. "Let's make some10picnic food，"says Mom.