问题
单项选择题
When the man came in, carrying the machine gun, most of us looked up in surprise, because we______anything like it before.
A．have never seen
B．never saw
C．didn't see
D．had never seen
答案
参考答案：D
解析：应选过去完成时，因为“(在我们看见那个拿机关枪的人)以前我们从未见过这种情况。”到过去某一时间为止的动作要用过去完成时。