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


  1. A.
    Until
  2. B.
    While
  3. C.
    If
  4. D.
    Since
B
試題分析：考查連詞：A. Until直到B. While雖然C. If如果D. Since自從，句意：雖然H7N9是致命的病毒，吃完全燒熟的雞肉還是安全的，選B。
考點：考查連詞
點評：這幾個詞都是連詞，要分清每個連詞短語的含義和用法，做題時關(guān)鍵看上下文和句意的邏輯關(guān)系做題。While的用法有：1.表示“當(dāng)……的時候”，2.表示讓步，意為“盡管”“雖然”。3.表示對比或轉(zhuǎn)折，意為“而”“但是”。
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