补写出下列句子中的空缺部分。
战胜挫折和磨砺意志的内在动力是( )
词形转换。用括号内所给单词的适当形式填空,每空格限填一词。
____(lucky) , I had an umbrella, but I still got wet.
关于函数y=(500﹣10x)(40+x),下列说法不正确的是( )
My birthday is in May. It's in the _____ month of the year.( )