Question 8: While we __________dinner at a restaurant, someone came to

Question 8: While we __________dinner at a restaurant, someone came to the house and _________ this note.

• A. had had/ left
• B. were having/left
• C. had/left
• D. were having/had left

sau while chia thì tiếp diễn; hành động đến và take note diễn ra liên tiếp nên dùng thì quá khứ đơn để liệt kê.