While building a tube through the mountain, _____. [ ]

_______man must fear when travelling in space is radiation from the sun.

They’ve moved to a different house_________their children can attend a better school.

uggested that vehicle taxes should beset ____ on how dirty the car’s exhaust is, with no tax ___________ on the mostenvironmentally friendly one

I didn’t enjoy the play given by those young people.— ______.