Driving on these roads ________ be very dangerous, especially when it is rainy or snowy.


  1. A.
    should
  2. B.
    must
  3. C.
    can
  4. D.
    shall
C
解析：
can在此表示“有時(shí)可能會(huì)”，其他幾項(xiàng)皆不符合題意要求。
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