Change the following sentences into passive voice
AE CHUYỂN THỂ BỊ ĐỘNG GIÚP MÌNH VỚI
2. Who defeated the champion?
=>
1. People believe that this new teaching method is more effective than the old one. => This new teaching method
2. It is expected that some solutions will be made
=> Some solutions
3. People think that climbing is a dangerous sport
=> Climbing.
4. It is rumoured that the towers were built very long ago
=> The towers