根据括号前的字母提示,在括号里补全单词,使句子完整、

根据括号前的字母提示,在括号里补全单词,使句子完整、
1.My English isn't good enough,so i must try my best to i( ) it.
2.I didn't go to school u( ) i was seven years old.
3.The t( ) festival in China is the Spring Festival.
4.It's i( ) to eat balanced diet.
5.Someting is wrong with his back.Hhas a b( ).
6.I hope you're e( ) my school in Mexico City.
7.My favorite vegetable is b( ) sprouts.
8.He is very worried because his speaking doesn't i( )