根据所给提示完成句中单词。
--Alice, here are some g ____ for your birthday.   --Thank you.
Jenny wants to get Jay's a____  She is his fan.
Look!  It's going to rain. Take an u____  , please.
Last week was very rainy, and r____ fell every day.
He takes part in a swimming c____.
Every year many ____.(visit) come to Beijing to see the Great Wall.
Ann fell off her bike yesterday.____(luck), she didn't hurt herself.
Jenny wants to be a tennis ____(play) when she grows up.
Yesterday I watched a TV play about____(live) underwater.
We saw some____(real) clever animals in the zoo.

         you are.

下列命题：①三角形的一条中线将三角形分成面积相等的两部分；②平行于同一条直线的两条直线互相平行；③若 $\left|a\right|=\left|b\right|$ ，则 $a=b$ ；④对于任意 $x$ ，代数式 $x^2-6x+10$ 的值总是正数.其中正确命题的个数是（   ）