题目

He is taller than he ______. A. used        B. used to be C. used to      D. used to do 答案：B 解析: 选B。学生在做该题时，极易选择C，原因是为了避免重复已经出现的动词，以不定式to来代替整个不定式结构，而正确的答案是B。如果在省略的动词不定式结构中含有be, have或have been，通常保留be, have been。又如： —Are you o holidays?   —你在度假吗？ —No, but I’d like to be. —不是，但我倒愿意。Three-fifths of the cattle ________ sold abroad in the city. [　　] A．hasB．has been C．haveD．have been