Hi, Anonymous, The correct spelling is gramm a r . I say either for or of works here. I would drop responsible and just say eithical .
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AnonymousIs it ethically responsible for Chinese businesses to use child labor? orIs it ethically responsible of Chinese businesses to use child labor?It's usually for noun to verb when you're replacing "dummy it" at the beginning.
AnonymousThe correct spelling is labour in UK EnglishAnd the correct spelling is 'labor' in American English.