题目

When the opportunity arose for me to do some summer traveling, my first urge was to southeast Asia. Being budget-conscious, I eventually decided on Thailand.   I’d been introduced to the country by the well-received 2010 Thai film Uncle Boonmee Who Can Recall His Past Lives, which sleepily brings out a land in which a dreamy sense of the unknown is so obvious and superstition(迷信) is not only a natural response, but a wise one.   On the warm and rainy island of Phuket, I found the best way to access Thailand’s treasures was by motorbike. I rented one for four days for about 200 ______ about wild plants that they decided to make a trip to Madagascar for further research. 　　A. So curious the couple was 　　B. So curious were the couple 　　C. How curious the couple were 　　D. The couple was such curious