题干
---I phoned you at 7 yesterday evening but nobody answered.
---Oh, I ______ my dog in the park then.
---Oh, I ______ my dog in the park then.
A：walked
B：was walking
C：had walked
D：would walk
答案(点此获取答案解析）
B
的面积的m倍，那么m=（ ）
