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
答案
正确答案:C

句意为“Mary过去常骑自行车上班,但是她现在习惯坐公交去上班”。used to do sth表“过去(常常)做某事”,be used to doing sth表“习惯做某事”,所以第一个空中ride用原形,第二个空中take要变成动名词形式taking。所以答案选C。

略
