The zoo keeper is worried because the number of visitors ______ smaller and smaller .
This book is ________for a six-year-old child to read.
The window was broken. Try to ________who has broken it.
Don’t forget to turn ________the lights when you leave the office.
She’s feeling ________ tired.
一 Would you like to see the film with me ? 一 Sorry.I ___________ it twice.