问题补充:
There is no doubt the boxes were then put on a train for Konigsberg, was at that time a German city on the Baltic Sea.
A. whether, which
B. that, where
C. that, that
D. that, which
答案:
A. whether, which
B. that, where
C. that, that
(答案→)D. that, which
解析:可联系答.案.网客服索取。