单选题
Although he has had no formal education, he is one of the ______ businessmen in his company.
A、
shrewdest
B、
sternest
C、
nastiest
D、
alertest
【正确答案】
A
【答案解析】
shrewd精明的；机灵的。stern严厉的；坚定的。nasty污秽的；险恶的。alert警觉的；留心的。
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