unless用法you old computer doesn't work/you needn't buy a new

unless用法you old computer doesn't work/you needn't buy a new “One must work hard,------------?"A.needn't you B.needn't he My computer doesn't work -.could you give me a help?Sorry,l` You needn't finish your work now. you needn't _____(work) late tonight. 不明白的英语用法原文：HE doesn't turn the lights on unless you got mone _________ you work hard, I’ll buy a new computer for you. A. The pen doesn't work.I need to buy a new one to write ____.A They___the computer.A.don't need buy B.needn't to buy C.don' What a pity my new computer doesn't work ___must be somethin The pen doesn’t work .I need to buy a new one to write_____ You () go to work before eight tomorrow A.needn't to B.don't