问题
选择题
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
答案：D
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。