2)根据下面一段对话内容，从对话下边方框内的选项中选出能填入空白处的最佳选项，其中两项为多余选项。 A: Oh, hi, Tess! I’m sorry. I’m thinking about something. B. ____(16)____ A. I am. I havea chance to go onatour. B: A tour What kind of tour A- A music tour. ____(17)____. B- Wow! That’s great. They are pretty famous. A- ____(18)____. B: So you’re going to do it A. I don’t know. ____(19)____. B: It sure would! Where will the tour go A: ____(20)____. B: How long is the tour A: Four months. B：OK, wish you a happy travel! A：Thank you!

A．This tour is the chance of lifetime．
B．It goes all over North America and South America．
C．It looks like you’re dreaming about something．
D．You’ll have to quit school and your job at the store．
E．My agent wants me to go on a tour with Art’s Jazz Band．
F．Have you told anyone about this yet
G．It would be a great opportunity!

阅读下列材料，回答问题。

材料一：

        山西保德县的天桥村，全村1000多口人，过去靠种玉米、土豆为生，生活不算富裕，村干部为带领大家脱贫，办起了12个石灰窑。近两年收入多了，但地里玉米只长杆不结重穗，土豆也长得不好，原先外销的土豆还得从外地买入。

材料二：

        加拿大的哈德孙湾冰层变薄，每年结冰期减少2至3周。生活在这里的北极熊以觅食冰层上的动物为主，现在食物减少，只能经常光顾周围的小城。材料三现在的太原平均每天拆除一根烟囱，每年投入6亿元进行清洁生产工作。

（1）天桥村的玉米、土豆减少的原因是

                                                                                                                                                        [ ]

         A、土壤的组成变化

         B、土壤pH值变化

         C、农业劳动力减少

         D、大气污染

（2）天桥村走这样的致富路可取吗？为什么？ 

     _______________________________________________________________________________________

     _______________________________________________________________________________________

（3）哈德孙湾冰期缩短的原因是___________________________，造成的原因是

     ①_____________________________________________________________________________________

     ②_____________________________________________________________________________________

（4）太原拆除烟囱的目的是_________________________________________________________________

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