Mary used to ________ to work, but she is used to ________ to work now.
A:riding a bike; taking a bus
B:riding a bike, take a bus
C:ride a bike; taking a bus
D:ride a bike, take a bus
下列行为属于正确行使姓名权的是 ( )
①大学生赵亮用笔名“小草”发表文章 ②梁红在步入歌坛后给自己起了个艺名
③初中生李某的监护人代他更换了名字 ④张某用李某的名字跟别人签订了合同