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?

已知F（x）= ${\int }_0^x$(t²+2t-8)dt，（x＞0）．

（1）求F（x）的单调区间；

（2）求函数F（x）在1，3上的最值．

15世纪末，欧洲人开始认识到一种新现象——通货膨胀即价格的普遍上涨。1500年以后，（西欧）价格很快开始迅速上涨。在这个世纪里，整个欧洲大陆的价格平均上涨了4倍。这种现象