问题补充：
Jenny is on holiday now. I wonder .
A. when she will come back
B. when she came back
C. when will she come back
D. when did she come back
答案：
(答案→)A. when she will come back
B. when she came back
C. when will she come back
D. when did she come back
解析：考查间接引语。句意：Jenny现在正在度假。我想知道她将何时返回。
根据时态首先排除B和D。特殊疑问句作宾语从句，语序要发生改变。故选A。
