【题目】The WHO ________ eat less bacon and other preserved meat because they can cause cancer.
A. appeals people to B. appeals to people to
C. calls in people to D. calls on people
在线课程【答案】C
【解析】
试题分析：考查短语。句意：我们过了许多年这个节日了，这个节日可追溯到唐代。And连接两个分句，后面一句话也是完整的句子，date back to追溯到……，故选C项。