--- Why do you always put this book in your backpack?--- Because this book ________ my interest in the study of history.
—Could you tell me ____________?—Sure. Walk straight along this street and you’ll find it.
---Look, the man looks like Green.---It _______ be him, for he _______ to America.
--- Lily wants to know if we ________ a picnic this weekend.--- Yes. If it ________, we will stay at home to play cards instead.
My friend Amy _______ text messages to me on the mobile phone, but now she _______ e-mails on QQ.
I have so much homework to do that I don’t know ________.