Question

---What is that? Is it an English learning machine?
---Yes. It ________ us to improve our English.
A. is used for helping          B. used to help     C. used to helping

Answer 1

A

考察、used 用法。be used for doing sth表示用來做某事。Used to do sth過去常常做某事；used to sth習慣于某事。句意：那是什么？是一部英語學習機嗎?是的，它是被用來幫助我們提高英語的。故選A。