4.听下面一段独白,并按要求在试卷上完成任务,你可以边听边完成任务.然后你会看到4个问题和相关的选项.请从每个问题A、B、C、三个选项中选出最佳选项.听独白前,你有20秒钟的时间来阅读有关材料和4个小题.听完独白后,你有20秒钟的时间来选择有关选项.独白连读两遍. 12.How long did the speaker volunteer at the local store? A.For a week B.For one year. C.For a month 13.What did the young lady want to buy for her son? A.A toy. B.Foods. C.Clothes 14.What happened to the young lady's wallet? A.She lost it somewhere. B.She left it at home. C.Some one took it away. 15.Who was surprised when the young lady returned the money? A.The speaker. B.The speaker's husband. C.The speaker's son.