As many as five courses are provided, and you are free to choose suits you best.
A. whichever
B. whatever
C. whenever
D. wherever
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(答案→)A. whichever
B. whatever
C. whenever
D. wherever
解析：考查宾语从句。Whichever引导宾语从句Whichever suits you best，并在句中做主语。本题特别容易错选B。what是没有任何范围限制的任何一个，而which是指在特定范围之内中的一个。