We have to play inside because it is raining.（英译中)

The reason why we have to grow trees is that they can supply fresh air for us.（英译中)

So precious is time that we can’t afford to waste it.（英译中)

We have reason to believe that he was murdered.（英译中)

Is it necessary for me to attend the meeting？（英译中)

We have subscribed to an evening newspaper.（英译中)

It is bad manners to interrupt.（英译中)