2. Mettez les verbes entre parenthèses au prétérit ou au past perfect.
a. When he . (meet) the president in the Oval Office, he . (already / be invited) to the White House four times.
b. She . (tell) me that she . (never / see) Mount Rushmore before.
c. He . (not / see) the match because he . (forget) to buy a ticket.