未分类题

The outbreak was thought to have been started

A.purposefully.
B.accidentally.
C.on
B.
D.in
C.


【参考答案】

D
推断题。新闻指出,科学家们正在努力找出大肠杆菌爆发的根源,但是现在没有明确的,他们认为源头可以追溯到来自西班......

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