题目

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式Two pandas, Da Mao and Er Shun, sent to Calgary Zoo in Canada in 2014, are being sent back to China two years ahead of schedule. The animals feed on fresh bamboo, 【1】 is especially flown in for them from China. Some joked that the pandas are leading too luxurious life. But with the pandemic（流行病）【2】（disturb）flights, fresh supplies have got 【3】（delay）. According to the zoo staff, pandas are picky eaters and will reject bamboo that has spent a lot of time in transport.The panda龋齿是牙齿的哪一部分被损坏（ ）A. 牙骨质 B. 牙釉质 C. 牙髓 D. 牙根