—Mr Hu, can you tell us how to learn math well?

       —Sure. But remember nothing can be learned _________ hard work.

     A. by          B. at            C. without       D. for

—Mr Hu, can you tell us how to learn math well?

—Sure. But remember nothing can be learned______ hard work.

A.     by B. at C. without D. for

---Mr Hu, can you tell us how to learn math well?

---Sure. But remember nothing can be learned _________ hard work.

1. A.
   by
2. B.
   at
3. C.
   without
4. D.
   for

---Mr Hu, can you tell us how to learn math well?
---Sure. But remember nothing can be learned ______ hard work.

1. A.
   by
2. B.
   at
3. C.
   without
4. D.
   for