Choose the best option (A, B, C or D) to complete each of the following questions.
1. If I were the mayor, I _________ single-use plastic in this town.
2. Most of the garbage is dumped in _____________ sites.
3. The cost of the holiday includes _________ at a five-star hotel.
4. Some experts believe that in 2050 most classes _________ a robot teacher.
5. Alexander Fleming, ______ discovered penicillin, was awarded the Nobel Prize in Medicine in 1945.
