---I think Miss Gao must be in the library. She said she would go there. ---No, she ___________ be there. I have just been there.
- Do you know some butterflies taste with their feet? - _______ I can't believe it.
It was difficult for me to _______ this morning because I slept too late last night.
- Mum, why _______ some water? - Good idea. I am feeling a little thirsty.
- _______ does it take to get to the bus stop from your home? - About twenty minutes.
- Who left the window _______? - Sorry. I forgot _______ it when I left yesterday.