13. 【2019 • 云南省昆明市】 In order to take a pleasant trip to Kunming, Dave emailed me to ask ____________ .
A. what was Kunming most famous for
B. what Kunming was most famous for
C. whether is summer a good time to come
D. whether summer is a good time to come
【答案】B
【解析】句意：为了去昆明旅游愉快，戴夫给我发电子邮件，问昆明最有名的是什么。宾语从句要用陈述语序，排除选项AC；结合句意"为了去昆明旅游愉快，戴夫给我发电子邮件，问昆明最有名的是什么"可知，主句是一般过去时，宾语从句要用过去时，选项D时态不对，也语意不通。故选B。