Hi,
Here's some extra interactive grammar exercises for File 02A (Present Perfect & Past Simple).
Present Perfect I
Present Perfect II
Present Perfect vs. Past Simple I
Present Perfect vs. Past Simple II
Present Perfect vs. Past Simple III
Present Perfect vs. Past Simple IV
Present Perfect vs. Past Simple V
Present Perfect vs. Past Simple VI
Present Perfect vs. Past Simple VII Present Perfect II
Present Perfect vs. Past Simple I
Present Perfect vs. Past Simple II
Present Perfect vs. Past Simple III
Present Perfect vs. Past Simple IV
Present Perfect vs. Past Simple V
Present Perfect vs. Past Simple VI
I hope they are useful