By the time I arrived at the airport she for New Zealand.A. would be leaving B has left C

问题补充：

By the time I arrived at the airport, she for New Zealand.

A. would be leaving B has left C will have left D had left

答案：

解析：考查时态。By到…时为止；该连词与完成时连用；连词by到…时为止；该词经常与完成时连用，如果后面是将来的时间，就使用将来完成时。本题by后面使用了过去时arrived，说明后面的主句使用过去完成时。句意：到我到机场的时候，她已经启程去了新西兰了。故D正确。