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第（9）题 参考答案：
答案解析：
判断题：第（9）题
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第（42）题
第（42）题
What did Europeans think of potatoes?
What did Europeans think of potatoes?
By referring to the artificial grammar, the author intends t
By referring to the artificial grammar, the author intends to show__________ A．i
第（7）题
第（7）题
听{MP3:http://wximg.233.com/attached/media/20160926/201609261
听{MP3:http://wximg.233.com/attached/media/20160926/20160926171427_4240.mp3}录音，回答