题干
—Why didn't you pick up my phone yesterday evening?
—Oh, I _____ in the kitchen at that time.
A：am cooking
B：cooks
C：was cooking
D：cooked
答案(点此获取答案解析）
C
—Why didn't you pick up my phone yesterday evening?
—Oh, I _____ in the kitchen at that time.
A：am cooking
B：cooks
C：was cooking
D：cooked
,则三角形的形状为 ( )