题干
As long as I can remember，________I called，my son would answer．( )
A：before
B：while
C：until
D：any time
答案(点此获取答案解析）
D
As long as I can remember，________I called，my son would answer．( )
A：before
B：while
C：until
D：any time
时用天文望远镜观测到
某恒星，若固定望远镜，则7月9日再次观测到该恒星的时间是