After the bell rings, which indicates the ending of the exam, you_____ stay ____ you are until all your papers are collected.
He studied as hard as he could _____ to enter a good college.
He was in great need of money, so he _____ $5, 000 for his car.
I think the doctor is able to care of _____ is the matter with your son .
He has read the book as many as, if _____ than, five times.
Let us not waste ______ time we have left .