Complete sentences with given words

Ex: Complete sentences with given words
figure out              make sure               check out                   double-check             pay attention to
1. ............... this new English learning app. It's really helpful!
2. After hours of studying. I finally managed to ................. the solution to this English puzzle.
3. .................. to practice speaking English every day to improve your fluency.
4. Before you submit your essay, .............. your grammar and spelling.
5. While speaking English, .................. the pronunciation of English words for better communication.