英语 1.改错：can you give us some ideas?

英语 1.改错：can you give us some ideas?
2.he dresses himself ,washes his face and goes out to run _____ .
A.ourside the air B.out the gate C.in the open air D.on the land
3.then he has half an hour ____ sports .
A.in B.on C.for D.to
4.what's ____ do you think are suitable for the trip ---- trainers ,i think.(填空）