Whether the wounded sent to the hospital unknown.A. has been; isB. have been; areC. were

问题补充：

Whether the wounded sent to the hospital unknown.

A. has been; is

B. have been; are

C. were; are

D. have been; is

答案：

A. has been; is

B. have been; are

C. were; are

(答案→)D. have been; is

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