[ Idioms ]
To “catch on” means ___.
a. to understand
b. to be punished
c. to grab something
Random Topics:
Simple Future TensePresent Continuous TenseEveryday vs. Every Day
How to use : Read the question carefully, then select one of the answers button.
Tips : If this page always shows the same questions, make sure you correct the question first by pressing the "check answer" button.