—Oh, sorry. I (walk)in the park at that time.
— I _____ for an important telephone call at that moment.
—Sorry, I don't know. I ________ the math problem.
—Sorry. I ______ an online class at that time.
—She cut herself while she ________ lunch.
—Sorry, I ________ with the manager in the meeting room at that time.
—Sorry. What's that? I________ about something else.
— Oh, I_________a walk with my mother at that time.
—Sorry,I don't know.She ________ it this morning.
—Sorry, I ________. Could you say it again?
—Yes, I a shower at that time.
—I soccer with my classmates when you called me.
— I hurt it while I ___________ a model plane.