________ you prefer, I'll give it to you. But we haven't any other models for you to choose from.

We should keep an open mind about some strange old wives’ tales,     they do have some truth in them.

I don’t doubt_______what he said is true.

Air pollution is getting more and more serious, so we must take action          it is too late.

 ________ you are supposed to do ________ you don't like a thing is change it. Don't complain.