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1.her --------- brother is 5 years ------ than he is

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1.her --------- brother is 5 years ------ than he is
A older older B elder older (顺便说一下older elder的区别)
2.when ----- the kind of medicine-------?
A did used B was used C is used D are used
3.------ crying for help---- you are heard
A stop until B keep when C don't stop until D don't stop after
要理由
1.her --------- brother is 5 years ------ than he is
1b 意思一样,用法不同,作定语修饰名词的时候就是elder(相当于形容词),在比较级中用older
2b be used 被使用的意思,这里应该是药物已经被使用过了,过去式
3a意思是直到你被听到了再停下呼救.