You can only be sure of __________ you have at present; you cannot be sure of something __________ you might get in the future.

It was hot weather that he went for a swim

He was made ______ the floor after classyesterday.

Why are you so _______,Amy—I thought I lost my purse, but I didn’t. I found it in my study!

You must observe and gather information like Nicolaus Copernicus ________ you want more career advancement opportunities