—John,you ( )go out to play until ( )your homework .—OK,Mum.A.must; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes 为什么选B,不能选C—John,you ( )go out to play until your homework ( )—OK,M

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—John,you ( )go out to play until ( )your homework .—OK,Mum.A.must; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes 为什么选B,不能选C—John,you ( )go out to play until your homework ( )—OK,M
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—John,you ( )go out to play until ( )your homework .—OK,Mum.A.must; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes 为什么选B,不能选C—John,you ( )go out to play until your homework ( )—OK,M
—John,you ( )go out to play until ( )your homework .—OK,Mum.
A.must; finishes
B.can’t; is finished
C.can’t; has finished
D.needn’t; finishes
为什么选B,不能选C
—John,you ( )go out to play until your homework ( )
—OK,Mum

—John,you ( )go out to play until ( )your homework .—OK,Mum.A.must; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes 为什么选B,不能选C—John,you ( )go out to play until your homework ( )—OK,M
首先,你以后学习一定要认真,刚才由于你不认真,我说的有点严重,望理解
你这题让你抄错了,原题是这样的.
—John,you ( )go out to play until your homework ( ) .—OK,Mum.
答案:B.
解析:第一个空用can't 表示不可以,不能,第二个空是被动语态,因为作业自己不能写,要用被动语态,所以选B.而C是主动语态,是错误的.
翻译:约翰,直到你完成了作业才能出去玩.
好的,妈妈.

第二空:A、C、D都是主动语态,只有B是被动语态。作业自己不能发出完成的动作,只能是被完成,故要用被动语态。所以,答案是 B。