1. They have discussed the pollution problems since last month _______________________________________________________________ 2. Is he going to repair this bicycle? _______________________________________________________________ 3. Have you sent the invitation cards to your friends? _______________________________________________________________ 4. My father moved the sofa into the living room. _______________________________________________________________ 11. Her sister is preparing the breakfast in the kitchen. ______________________________________________________________ 12. We should clean our teeth at least once a day. ______________________________________________________________ 13. The shop assistant handed the packages to the customer. ______________________________________________________________ 14. The director awards the first prize to the best competitor. ______________________________________________________________ II. Finish each of the following sentences so that its meaning stays the same. 1. Phillip had gone out before they arrived. → After _________________________________________________________ 2. I had lunch then I watched an interesting film. → Before ________________________________________________________ 3. There had been a power cut before they got out of the room. → When _________________________________________________________ 4. After the manager had informed us clearly about the job, we started our work. → By the time _____________________________________________________ 5. My father had had dinner by the time I came home. → Before ________________________________________________________ (5* câu + trl hay nhất ạ)