There are a lot of online language learning programs which are able to………. with learners.

A. interaction (n) interaction

B. interactive (adj) is interactive

C. interact (v)

D. interact (v) interact

Structure: be able to V: be able to do something

=> There are a lot of online language learning programs which are able to interact with learners.

There are many online language learning programs that can interact with learners.