Réponse :
a. These car are made in Japan by them
b. Litter mustn't be dropped in the street by you
c. Our window was smashed last night
d. The TV set has already been repaired by them
e. Public transport will be needed
f. The wall is being decorated by them
g. The roof shouldn't be replaced by you
h. Less money is being spent this year by people
i. The meal had been cooked before 10 o'clock by them
j. This food is sold in every shop by them
k. The wall was being built when I was there.
l. More parcels were delivered last year by people