题目内容:
( ) --Do you know_______from Tianjin?--Next Saturday. A.whenJohn came back
A.when John came back
B.whenJohn will come back
B.when John will come back
C.whendid John come back
C.when did John come back
D.whenwill John came back
D.when will John came back
参考答案:
答案解析: