1. isn’t / petrol / lead / in / used / nowadays.
2. sold / low-cost flights/ online / are.
3. an / were/ architect / by/ Petronius Towers/ designed / the / Argentinean.
4. wasn’t / Steven Spielberg / Avatar / by/ directed.

1) Lead in petrol isn't used nowadays.

2) Low-cost flights are sold online.

3) Petronus Towers were designed by Argentinian architect.

4)Avatar wasn’t directed by Steven Spielberg.

he is taking part in a running race now. (present continuous)

here's a short one, hope this helps:

my favorite singer is cesaria evora.  she was born in 1941 in cape verde,  a  small country located off the coast of africa.  her career really took off after she recorded her first album, "la diva aux pied nus" in the 80s.  she quickly became the grand dame of mornas, a specific creole genre of music and dancing.  her voice is easily recognizable, her appearance is memorable.  cesaria, while singing in  the native language of her little island-nation  is beloved around the world.  she has a marvelous stage presence, often dancing barefoot, smoking between the songs, and chit chatting with her musicians. 

ms. evora recorded 9 disks, her latest one in 2009.  she has stopped touring lately, after she suffered from a heartattack.