听下面5段对等方面或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前， 你将有5秒钟的时间阅读各个小题。听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
How many great events in China this year did they mention in their conversation

A. By using MBM (meat-and-bone meal) with different plants.
B. By eating infected (感染的) MB
M.
C. By importing foreign cattle.

A．heard
B．has thought
C．has shown
D．suggested