— How long can I ________ the book?—For two weeks.
_____ excellent work you have done!
— What ____ heavy rain it was! —Yes, but I love _____ air after it rains. It smells so fresh.
--What else must we pay attention to ____ our school clean?--We must not throw any litter onto the ground.
--I think Sam is the strongest student in our class.--I agree with you, but who is the second ____ one?
Don’t be angry with your kid when he makes a mistake again, because ____ of us are perfect at all.