_____H7N9 is a deadly virus, it is still safe to eat thoroughly-cooked chicken.A_刷题宝

题干

_____H7N9 is a deadly virus, it is still safe to eat thoroughly-cooked chicken.

A．Until

B．While

C．If

D．Since

上一题下一题 0.64难度单项选择更新时间:2013-05-19 11:09:54

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