4. Complete the Useful language phrases with the words in the box.

Useful language:

great | language | opinions | useful | problems | recommend

Completed phrases:

1. WordFind is a great language learning app.
2. It's useful because you can use it anywhere.
3. I would definitely recommend it to all English language learners.
4. Overall, I think it's a great app.
5. In my opinion, there are a couple of problems.