Vous pouvez m'aider svp
1. Le present perfect simple et be + V-ing
1 Pretérit, present perfect simple ou present perfect +
V-ing? Complétez ces phrases.

a. How long ... (you - campaign) in this association? You know
all the members!
b. My parents ... (buy) a hybrid car in the early 1990s. They...
(have) it for about 20 years.
c. How many people ... (criticize) the president for his in-abi-
lity to deal with the problem? Since he came to power, there​