问题
Do you know ________ — They moved here soon after their son was born.
A:when would the Greens move here
B:when the Greens moved here
C:the Greens would move here
D:when the Greens would move here ;
B:when the Greens moved here
C:the Greens would move here
D:when the Greens would move here ;
正确答案是：
