By looking at a problem in as many ways as possible, creative thinkers can find solutions that would _______ remain invisible.
I _____ you some money, but I hadn’t any on me then.
He treated me as though/as if _____ his own son.
You _____ come earlier. The bus left a moment ago.
Should it rain, the crops _____ .
_____ today, he would get there by Friday.