Can you tell me _____ there are any good museums in the city? A. if B. unless C. although
— 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.
--Have you phoned your brother? --Yes. He ____ to be back next week.