The fire is dangerous. We should _____________ as quickly as possible.

Look! There is beautiful rainbow in the sky． —Wow, it’s so beautiful. I’d like to take a photo ofrainbow before it disappears．

Three bridges ________ over the river five years ago.

Is this your book, Alice?—Yes, it is ____ book.

Oh, dear. Remember ______ your toys with Helen. She is your best friend.