Whether the wounded ____ sent to the hospital without delay ____ unknown yet.
A. have been; are  B. has been; is   C. were; are D. have ; is

Whether the wounded________ sent to the hospital without delay________ unknown yet．

1. A.
   has been；is
2. B.
   have been；are
3. C.
   were；are
4. D.
   have been；is

Whether the wounded________ sent to the hospital without delay________ unknown yet．

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