Was it at five o’clock ______the fire brokeout

依次填人下面一段文字横线处的语句，衔接最恰当的一组是如果说河对岸的草原上万籁无声， ，使所有的色调融合为浑然一体， 使所有的声音汇成合唱，那是多么奇伟的声音，多么壮观的景象!①各种声响使这荒野的世界充满一种亲切而粗犷的和谐②鸟喙击橡树干的笃笃声③可是，当微风吹进丛林，摇晃这些飘浮的物体，使白色、蓝色、绿色的生物混杂交错④野兽穿越丛林的沙沙声⑤动物吞啮食物或咬碎果核的咂咂声⑥河这边却是一片骚动和聒噪

I could have helped the old man ______ yesterday morning.

________ doesn’t Linda like math—________ she thinks it’s difficult.

Do you know that woman in blue? — Of course. She is kind and always ____ beautiful smiles on her face.