Question

1. and costly/It is /dangerous/but also /time-consuming/not only /./
→ It is 
2. on different channel / can enjoy / Television viewers / various interesting programs /./
→ Television viewers 
3. after / Many people / a hard working week/ go to the countryside / to have a rest /./
→ Many people 

Answer 1

1. and costly/It is /dangerous/but also /time-consuming/not only /./
→ It is not only  time-consuming and costly but also dangerous
2. on different channel / can enjoy / Television viewers / various interesting programs /./
→ Television viewers can enjoy various interesting programs on different channel 
3. after / Many people / a hard working week/ go to the countryside / to have a rest /./
→ Many people go to the countryside to have a rest after a hard working week

Answer 2

1. and costly/It is /dangerous/but also /time-consuming/not only /./
→ It is not only time-consuming and costly but also dangerous

2. on different channel / can enjoy / Television viewers / various interesting programs /./
→ Television viewers can enjoy various interesting programs on different channel
3. after / Many people / a hard working week/ go to the countryside / to have a rest /./
→ Many people go to the countryside to have a  rest after a hardworking week