题干
A: What you do yesterday?
B: I did my homework.
A：did
B：do
C：does
答案(点此获取答案解析）
A
B: I did my homework.
A：did
B：do
C：does
水，然后将易拉罐竖直向上抛出，空气阻力不计，则下列说法正确的是（ ）