1- tennis is played by Roger Federer
2- Olympic games are attended by many athletes (attend = participer) alors le verbe n'est pas très correct
3-Many medals have been won by Usain Bolt
4- Boxing is practised by Mohamed Ali
5-America first has been populated by Indians
6-The Atlantic Ocean has been crossed by the Pilgrims
7--The Mayflower was boarded by them (eux ou elles)
8- Plymouth was built by them
9-tradibng was begun by them ( auxiliaire to be/began/ begun)
10-Cotton and tobacco were sold by them
11-Different topics have been studied by us( nous)
12-English has been learned by us
13-School will be leaved by the students soon
14-University is begun by her (elle) in september
15-Foreign countries will be visited by tourists
16-Their tickets had already been bought by them
17-Their destination has been choosen by them
18-A train would be catched by him
19-A jumbo jet would be flown (to fly / flew/flown) by him
20-The word would be travelled by him
OUF c'est fini, je pense que ce doit être correct!
