要解释Don't download anything unless you make sure ______.

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要解释Don't download anything unless you make sure ______.
Don't download anything unless you make sure ______.
[ ]
A.where it is from
B.where it would be from
C.where is it from
D.where had it been from

Don't download anything unless you make sure （A.where it is from）.
不要下载任何东西,除非你确认了它的来源.
这里要选一项作为make sure的宾语从句.这种从句的特点是要使用陈述语序,即主语要放在动词之前.另一个特点是时态要和主句的一致,这里要用现在时.
错误选项的分析：
B.where it would be from：时态不对,是过去将来时.
C.where is it from：语序不对,应该是it is.
D.where had it been from：语序不对,时态也不对.

要解释Don't download anything unless you make sure ______. 英语翻译Don't promise anything unless you are 100% sure!谁能帮我翻译哈. Don’t _____ the camera ______ unless you are sure you can pu download failed an unknown error occurred make sure that you Don't do anything unless I ask .A.you to B.you C.of you D.yo Don't do anything unless i ask——.A you do B you C of you D y this thing will make you can't download.Your sincerely. Make sure（） you don't forget to pack everything you are like 英语翻译i don't have you guys enough .make sure you always have if you don't want to get into trouble,then make sure you und 请帮翻译下don't want to make love with me ,unless you are my wife Don't make sure you know the fire exit nearest to your room.