问题描述：
I don't know when Jim _____.I'll meet him at the airport when he ____.
A.will return；return B.returns；will return C.returned；returned D.will return；returns 说明原因喔
A.will return；return B.returns；will return C.returned；returned D.will return；returns 说明原因喔
问题解答：
我来补答展开全文阅读