Su Hai and Su Yang at home . Look, they their study.A. are, are cleaning B. is ,clean C. are, are sweeping
When the house is on fire, the firemen let people _________ the fire.
He makes his class _________, so he always makes the students ____________.
A: ______________ B: Never mind. What can I do for you?
____________! It’s getting dark.
A: __________ do you have a bath in winter? B: Once three days.