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
阅读下列诗歌,完成小题。 望 岳 杜甫 岱宗夫如何?齐鲁青未了。造化钟神秀,阴阳割昏晓。 荡胸生层云,决眦入归鸟。会当凌绝顶,一览众山小。
生活在社会主义法治国家,学习和了解宪法是我们每个公民的责任。读图并回答问题。