Boys and girls you choose to wear your clothes should be clean.A. howeverB. whateverC.

问题补充：

Boys and girls, you choose to wear, your clothes should be clean.

A. however

B. whatever

C. whenever

D. wherever

答案：

A. however

(答案→)B. whatever

C. whenever

D. wherever

解析：句意：孩子们，不管你们选择穿什么，你们的衣服都应干净。however 然而； whatever无论什么；whenever无论何时； wherever无论何地，所以选B。