—What did you do during your summer holiday?
—I spent my holiday _____ English in summer classes.
A. improving             B. improves            C. to improve

—What did you do during your summer holiday?

—I spent my holiday _____ English in summer classes.

A. improving             B. improves            C. to improve

---What did you do during your summer holiday?
---I spent my holiday ______ English in summer classes

1. A.
   improving
2. B.
   improves
3. C.
   to improve

—What did you do during your summer holiday?

—I spent my holiday _____ English in Summer Classes.

A.improving                 B.improves            C.to improve