Up to now thousands of red phone boxes the old image of Britain due to mobile phones.A

问题补充：

Up to now, thousands of red phone boxes, the old image of Britain, due to mobile phones.

A. removed

B. have removed

C. were removed

D. have been removed

答案：

A. removed

B. have removed

C. were removed

(答案→)D. have been removed

解析：答案：D考查动词时态和语态。根据时间状语up to now通常与现在完成时连用，故排除A、C两项；主语“thousands of red phone boxes”与动词remove之间构成动宾关系，所以用现在完成时的被动形式。故选D项。