VERB TENSES
This time next month I (relax) on the beach with my friends.
This time next month I will be relaxing on the beach with my friends.
My mother (usually not cook) in the evenings, but tonight we (have) an important family dinner, so she (cook) for three hours now.
My mother doesn't usually cook in the evenings, but tonight we are having an important family dinner, so she has been cooking for three hours now.
2) A mysterious letter was sent to her.