给一本书编页码，共有822页，其中数字“3”共用了____ 次．
选择合适的句子，补全对话。（有两项是多余的）
A. What did you do yesterday?
B. Where did you go yesterday?
C. How many children were there at the party?
D. Yes, he did.
E. Why did you visit Mike?
F. No, they weren't.
G. How many children are there at the party?
A:Hello, Liu Yun. ____
B:I visited Mike.
A:____
B:Because it was his birthday yesterday.
A:Did he have a birthday party?
B:____
B:There were fifteen children at the party.
A:Were Mike's parents at home?
阅读材料，回答问题
材料一：乃秦孝公用商君，坏井田，开阡陌，急耕战之赏……倾邻国而雄诸侯。
材料二：“商君治秦，法令至行，公平无私，罚不讳强大，赏不私亲近。”
﹣﹣《战国策•秦策》
一项任务，第一天完成 13 ，第二天完成 25 ，还剩这项任务的____（填分数）。
有位同学为了观察蚯蚓的运动，特意给蚯蚓体表涂了一层凡士林油，你认为蚯蚓将会（ ）
