I’m sorry that what I said just now has hurt you, but I didn’t do it _____.

He kept thinking of the question whether it was ____ for his father to change the habit of a life time in such a short time. 

So far we have done a lot to build a low-carbon economy, but it is ____ ideal (理想). We have to work still harder. 

In the TV ad, the actress is asked to jump with her mouth ________ open, showing her ________ teeth.

What a terrible experience! ________, you’re safe now — that’s the main thing.