问题描述：
最好能告诉俺为什么选这个答案,不选其他的.
1.By the time you get to New York,I ________ for London.
A.would be leaving
B.am leaving
C.have already left
D.shall have left
1.By the time you get to New York,I ________ for London.
A.would be leaving
B.am leaving
C.have already left
D.shall have left
问题解答：
我来补答展开全文阅读