用所给词的适当形式填空。 1. I ________ ( watch) videos on my last day off. 2. Did you have fun ________ (drive)? 3. There ________ (be)a bird and two cats in the tree a moment ago. 4. They ________ (buy) many________ (souvenir) on their last school trip. 5. That sounds ________ (real) boring.