单选题 All things ______, the planned trip will have to be called off.
A. considered B. be considered
C. considering D. having considered

【正确答案】 A
【答案解析】[解析] 分词与其逻辑主语之间的关系为被动，因此应选过去分词。分词的独立结构在句中作状语，表示原因。