_Daddy，look! Why_______ rainbow is like a bow_Oh，it is apologizing to________angry sky

The government________air quality in urban areas from levels one to five: excellent, fairly good, slightly polluted, poor and dangerous.

Does Miss Ye like playing __________tennis—No, she doesn’t, but she likes playing ________ piano.

We’ll have to race _____ the clock to complete thework on time.

____ the blackboard! What can you ____ on it