Compléter chacune des phrases suivantes en choisissant entre for et since.
I have been waiting for you sincefor
He has stared at us sincefor
We haven't eaten such a delicious cake forsince
last time we visited you.
They have been working on this project sincefor
She has been looking for a solution forsince
He has been trying to finish this exercise sincefor
half an hour.
She hasn't talked to John forsince
I have written to you every day sincefor
They have been studying in the library sincefor
You haven't looked so tired sincefor
last end-of-term examination.
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