题干
I _______ along the road when I saw Peter. So we stopped and had a chat.
A：walked
B：was walking
C：would walk
D：had walked
答案(点此获取答案解析）
B
I _______ along the road when I saw Peter. So we stopped and had a chat.
A：walked
B：was walking
C：would walk
D：had walked
的三等分点，M是AB上一动点，则CM+DM的最小值是（ ）