— Would you please tell us ?—In half an hour I think.A. when will he come backB. when he

问题补充：

— Would you please tell us ?

—In half an hour, I think.

A. when will he come back

B. when he will come back

C. when he came back

答案：

解析：句意：你能告诉我们他什么时候回来吗？我想，半小时之后回来吧。题目中用了In half an hour半个小时后，表示将来的时间，故时态用一般将来时，宾语从句必须用陈述句的语序，故选B