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【题目】Mr Jiang isn’t as busy as before because there no home robot to help him

A. used to beB. may beC. used to haveD. may have

【答案】A

【解析】

句意:江先生不如以前忙,因为过去没有家用机器人来帮助他。used to be过去是, may be可能是, used to have过去有,may have可能有。There be句型,表示存在,意为。根据Mr Jiang isn’t as busy as before可知此处指的是过去,故用used to be。故选A

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