GIÚP TỚ VỚI EXERCISE I : Give the correct form of the verbs in brackets. 1. We've practiced ___________ (handle) animals. 2. I was thinking about _________ (do) another course as we would be off in some weeks. 3. She went on ______________ (talk) even though the film had started. 4. If students enjoy _________ (be) in class, they are more likely to learn. 5. ____..............___ (understand) how customers make decision has been a neglected area of research so far. 6. Organizations invest huge amount of money in _________ (develop) packaging that they believe is effective. 7. ________ (get) customers to change brands is a challenge for manufacturers. 8. Jim ended up _______________ (buy) a new TV after his old one broke. 9. Bill avoided ___________ (do) his math assignment because the World Series was on. 10. It might be worth __________ (phone) the station to check the time of the train.