Question

Recordersare used ________ our students’ listening skill.

1. A.
   to help improve
2. B.
   to helping to improving
3. C.
   to help improving
4. D.
   helping to improve

Answer 1

A
录音机被用作帮助提高学生的听力技巧，为use 的被动用法be used to doing 习惯作某事