疱疹性咽峡炎最常见的病原体是（）
A.埃可病毒
B.鼻病毒
C.柯萨奇病毒
D.副流感病毒
E.流感嗜血杆菌
参考答案：C
梁启超阐述变法图存道理的重要论著《变法通议》发表在：（）
A、《时务报》
B、《中外纪闻》
C、《国闻报》
D、《循环日报》
The flowers were so lovely that they ______ in no time. [ ]
A. sold
B. were sold
C. had been sold
D. would sell
