Dejte slova v závorce do správného tvaru (trpný rod)

1. The grammar problems  (to explain) by the teacher yesterday.
2. The letter  (to send) the day before yesterday.
3. This motorbike  (to sell). I want a new one.
4. A new pub  (to open) in our town next week.
5. This street  (already/to close) because of snow.
6. Black clothes  (can/not/to see) at night.
7. He  (to give) a big birthday cake for his last birthday.
8. All exams  (to take) within next week.