Rewrite the following sentences as directed

Rewrite the following sentences as directed.

48. Despite her success, she felt dissatisfied. @ Although __________________, she felt dissatisfied.

49. To use solar energy for a number of days is possible. @ It’s __________________ solar energy for a number of days.

50. Which language is spoken by most people in the world? @ Which language do                                                           ________________________ in the world?