— We have sixty students in our class. of them are boys. How many girls are there, do you know?— Forty.
It is important ________ you to get there on time.
I need _____________ food during the walk. What about you?
—What does Jane look like? —________
—Hi, Mike! Nice to see you. —_______
Teachers should ___them to continue studying when some students want to give it up.