A person, when he or she is young, can’t read __________many books. 

Bicycling is good exercise; ____, it does not pollute the air. 

—I heard a bus accident happened yesterday.—The bus crashed. Luckily, only a few passengers aboard were _____ injured in the traffic accident.

He was beaten by his father because of being naughty. ____, he became silent.

---You know Mr. Green has been ill for days? ---Yes, I wonder if he is _________ better now.