I saw you come to school by bus this morning — Oh, I ______ come to school by bus, but it is raining today.

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

The weather is getting warmer. I hope the children won’t go onto the ice.–I warned them_____.

Don’t worry about her,Madam. Your daughter is ____ danger now. [ ]

The expo is being held in Shanghai, _______a lot of advanced technology is shown for the first time.