the boy!A. How clever;isB. What clever;isC. How clever;he isD. What clever;he is

问题补充：

the boy!

A. How clever;is

B. What clever;is

C. How clever;he is

D. What clever;he is

答案：

(答案→)A. How clever;is

B. What clever;is

C. How clever;he is

D. What clever;he is

解析：根据what +a/an+adj+n（C）单数+主+谓！或how +adj /adv+主+谓！，故选A