一种衣服现在打九折出售，现在售价是45元，每件的原价是多少元？

①There is a ping-pong game on April ____ (twenty-nine)．

②____ Tom ____ (like) the tennis game?　

③Jim ____ (have) an art class every day.

④Do you know his brother is only 5 ____ (year) old?

⑤ My mother wants ____ (have) a party for me.

⑥Those boys and girls are all ____ (China).

⑦ -How many ____ (sweater) do you have?        -Three.

⑧Today is my ____ (twenty) birthday.

⑨They want to have two baseball ____ (game).

⑩When ____ (be) the School Day?

手臂上的一条条“青筋”实际上是人体的（    ）

“保护环境”是我国的基本国策．下列做法不应该提倡的是（　　）