选词填空。（用方框中所给的词的适当形式填空）

ill,  healthy,  stay,  babysit,   two

 
I’m ___▲ __ than most of the kids in my class because I exercise everyday.
Don’t worry about your mother’s ___▲ ____.
Mary plays tennis ____▲ __ a week. She plays it on Tuesday and Saturday..
I really enjoy   ▲   at the beach because it is so cool and relaxing
She is _____▲____ her little brother tomorrow