UNIT 4 CHOOSE THE CORRECT WORD ( A , B , C OR D ) TO COMPLETE THE SENT...

8. Lan hasn’t written to Maryam for a month.

a. It’s a month since Lan has written to Maryam.

b. It’s a month since Lan hasn’t written to Maryam.

c. Lan didn’t write to Maryam a month ago.

d. Lan last wrote to Maryam a month ago.