问题补充：
【小题1】.. You can find out the reason for this f (失败).
【小题2】.. No one can a (取得成就) anything without effort.
【小题3】.. That rich man has a large staff of s (仆人).
【小题4】.. He made a v (航海) to Australia last year.
【小题5】.. O (氧) is a gas without color, taste or smell, present in the air and necessary for us all.
【小题6】.. The d (密度) of the fog made it difficult to see where we were going.
【小题7】.. People of different r (种族) may have different colors of skin, hair and eyes.
【小题8】.The r (逃跑的) slave was caught by his owner and was almost beaten to death.
【小题9】.. “You never ask my opinion about anything,” Rod c (抱怨).
【小题10】.. S (有经验的) teachers have the experience needed to make their lessons interesting.
答案：
(答案→)
解析： 略
