Many a boy and many a girl___it since thenA have seenB has seenC has been seeing D had seen
问题描述：
Many a boy and many a girl___it since then
A have seen
B has seen
C has been seeing
D had seen
答
B
答
A
答
B
相当于 Every boy and every girl的主谓一致原理
答
应该是B