They are broadening the bridge to ________ the flow of traffic.

下列各句中，没有语病的一句是

It is no longer________it was 20 years ago，________it was so poorly equipped.[ ]

It is the prevention of disease ______ its successful treatment that has led to the rapid increase of theworld’s population.[ ]

Could you please give me a hand I can’t complete the task on time ______ your help.