Actually,you can be you want to be,a scientist,a doctor,an astronaut or a manager so long as you set your mind to it.
A. whatever
B. whoever
C. whomever
D. whichever
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(答案→)A. whatever
B. whoever
C. whomever
D. whichever
解析：考查名词性从句。此题易误选D,考生认为后面给的是一个范围,但是从语意上看,应是说话人的列举,而并非就这么多,所以应仍是泛指,因此选用whatever。