下列各句中，没有语病的一句是（ ）

_____ you are familiar with the author’s ideas, try reading all the sections as quickly as you possibly can

Do you think we are going the right way to the Forbidden City? —Sorry, I’m not sure．But it _______ be．

The trade union in this industry are ____ any reduction in wages.

The cigarette end thrown away by a careless farmer ______ the big forest and brought us great loss.