Whenever a natural disaster happens, we should offer _____ help we could, to those victims.

A. however
B. whatever
C. whenever
D. whichever
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科目：高中英語 來源：專項題 題型：單選題

Whenever a natural disaster happens, we should offer _____ help we could, to those victims.
[     ]
A. however
B. whatever
C. whenever
D. whichever

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