Would you please tell me ___? (要理由)

问题描述:

Would you please tell me ___? (要理由)
A.when would our teacher leave for London
B.when our teacher would leave for London
C.when will our teacher leave for London
D.when our teacher will leave for London

D.宾语从句要用阵述语序,A与C都为疑问语序,不可,排除掉;其次B答案中would为过去将来时,时态不符合,只可选D,为一般将来时.