I was ill last week, so I've really FALLEN ... in class. MEANING: Not to have made the expected progress because of missed time or work.
I was ill last week , so I've really FALLEN BEHIND in class.
She's an excellent student because she CATCHES ... TO new ideas very quickly. MEANING: To understand or realise sth.
She's an excellent student because she CATCHES ON TO new ideas very quickly.
I'm fluent in German, so I SAILED ... the exam with ease! MEANING: To succeed in doing something.
I'm fluent in German, so I SAILED THROUGH the exam with ease!