How long have you been there? —_______.[ ]

No regular advertiser dare produce anything that fails to stick to the _______ of his advertisement.

Kate and I _____ doing ______ homework now.

Look! There is beautiful rainbow in the sky．—Take the books for me, I’d like to take a photo ofrainbow before it disappears．

Do you knowthis dictionary belongs to?—Let me see. Oh, it’s.