2 Complétez en conjuguant le verbe entre parenthèses au present perfect en -ing.
a. We're tired. We ......... for hours. (work)
b. My schoolmate ......... to me all morning. (talk)
c. I'm sorry. I'm late. ........... you .......... long ? (wait)
d. ........... the baby ............ all night? (sleep)
e. The children.......... for a long time . (fish)
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