I’M SORRY I WASN’T IN THE OFFICE WHEN YOU PHONED. I KNOW I PROMISE...
98. I’m sorry I wasn’t in the office when you phoned. I know I promised to be.
A. I should have been in the office when you phoned.
B. I might be in the office when you phoned.
C. I must have been in the office when you phoned.
D. I should be in the office when you phoned.