Devoir Anglais exo 1 et 2 c pour demain de laide svp

bonsoir !

2-
a) will be preserved
b) don't give
c) will increase
d) continue using
d) will save

1- exo 1---pas sûr d'avoir compris : il faut choisir une des 2 propositions et ensuite for ou since ???
a) Melissa Clark has been a radio presenter for 20 years
b) She has worked for NPR since 2004
c) She has lived in Washington DC since she left university
d) She  has worked in environmental subjects for 10 years   (presque sûr ??)
e) She has won two prizes for her work since she started at NPR
f) She has interviewed the president twice since the  beginning of the year


c'est bon, j'ai compris. J'ai vu qu'il y avait des parties de phrases en italique et sans doute il fallait choisir. Un petit doute pour la d) mais je pence que si ça avait été since on aurait dit "sshe has been working......since 10 years )

bonne journée