单词拼写。根据句子意思及所给的中文意思或首字母提示完成单词。请将完整的单词填写在横线上。每空只能填一词。
Don’t read in the sun. It’s bad for your e______   _____ .
My mother is very ______   _____ (忙碌的)，so she never watches TV.
Beijing is a big city. It’s the c______   _____ of China.
The boy eats healthy food every day, so he is very healthy and ______(强壮的).
The ______  _____ (树叶) are green in summer and turn yellow in autumn.