（） his father works A how carefully Bhow careful c what a carefully
题目
（） his father works A how carefully Bhow careful c what a carefully
为什么？
答案
A
His father works carefully.
(careful是adj.用来形容名词；而carefully是adv.用来形容动词)
由上面那句话变换而来,所以选A
How carefully his father works!
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