(2014·南昌第二中学高三检测)We must keep our room clean，for dirt and disease go________，you know

He had great influence the manager andcould no doubt help you.[ ]

Scientists have many theories about how the universe into being.

The parents were unsettled for the firstfew days,abouttheir son’s safety.

I think we need ______ people to finish the work in two days.