问题补充:
单选题Hisgrandparentsusedto________awalkafterdinner,butnowtheyareusedto________awalkafterbreakfast.A.take, takeB.taking, takingC.taking, takeD.take, taking
答案:
D解析考察固定搭配,used to do sth 过去常常做某事 be used to doing sth习惯于做某事,句意:他的祖父母过去常常晚饭后去散步,但是现在他们习惯早饭后散步。故选D