1. The 2 pre-viewing exercises in this unit were designed to activate your previous knowledge and/or introduce new vocabulary.
Was this useful?
Yes, it helped me understand the video more easily.
No, the words presented are part of my active vocabulary.
I learned a few words, so it was somewhat useful.
2. The last exercise in this unit includes a grammar summary ("Introduction to the Present Perfect Tense").
Is this of any importance to you?
No, the distinction between this tense and the past is not really important.
Yes, it is relatively important to know and use the correct tense.
No, it was not important to me because I already know and use the Present Perfect.