[解析]
(1)B.细节理解题.由第一段Shoveling was Jamie's idea,a way to earn enough money for the new Ocean Kingdom video game that came out the next day铲土是杰米的主意,一种为第二天推出的新海洋王国电子游戏赚够钱的方法,可知扫雪是为了赚钱去玩游戏,故选B.
(2)A.理解推断题.由第四段"I haven't been able to get to the bank,我还不能去银行,可推知她现在没有现金支付,故选A.
(3)B.主旨归纳题.本文讲述了Grady夫人帮孩子们赶跑恶狗,而孩子们作为回报帮她清扫积雪,这是善意的交换,故选B.