Take more exercise every day, or you may ___________.

You can depend on sooner or later everything here will return to normal.

Will you ____ it that my birds are looked after well while I’m away?

I wonder how he could ______ not handing in his math exercises yesterday, for his math teacher is always strict with his students.

You have to take some necessities such as ropes, a flash, boots, ______ you may get lost in the mountain if going hiking