Exercise : Simple Past Tense and Present Perfect Tense

1. Scientists 1) have found a set of genes passed down only by mothers that appear to influence the ageing process. The researches 2) discovered that damage to our microchondria - the tiny powerhouses in our cells that turn the food we eat into energy - speeds up age - related conditions.
   
   
2. Greg Silverman, President, Creative Development and Worldwide Production Warner Bros, 3) has said that Affleck 4) was perfect for the role in Snyder's sequel while making the announcement yesterday.
   

   
3. Around 58 buildings were gutted by five on Friday in two separate locations in Makassar, South Sulawesi, but no casualities 5) had yet been reported, an official said.
   

   
4. Walking the walk : Hundreds of Chienese Indonesians from the Hok Tek Tong (HTT) community in Padang  6) accompanied their children, who were riding on top of a "centipede" carried by 1,500 men, in a carnival held to mark the city's 150th anniversary on Thursday. The carnival, which 7) had been unofficially dubbed "The World's Longest Centipede Carnival", 8) had 223 children riding a top the 243-metre-long centipede along a 3.9 kilometer route.
   
   

By : Muhammad Piqri Ardiansyah X MIPA 5