What are you going to do this afternoon?— I’ll probably go for a walk later on________it stays fine[ ]

Claudia, are you going to Jeff’s birthday party on Saturday—Unless I______.

The astronauts have to lie ________ the floor of thespaceship to fight against the great pressure during the flight.

Those who are _______ the plan, please put up your hands!

I wonder _______. —By searching the Internet.