Question 24. I don't know why Jessica wasn't at the meeting. She .....

Question 24. I don't know why Jessica wasn't at the meeting. She .................about it.

• A. must forget
• B. must be forgotten
• C. must have been forgotten
• D. must have forgotten

Câu chủ động với Modal verb "must", chỉ sự việc đã quên việc gì đã xảy ra trong quá khứ