Question 22: What _________ if there _________ a serious nuclear accid

Question 22: What _________ if there _________ a serious nuclear accident.

• A. will happen / was
• B. happens / were
• C. would happen / were
• D. would happen / had been

A. will happen / was → Sai cấu trúc câu điều kiện loại 2
B. happens / were → Sai cấu trúc câu điều kiện loại 2
C. would happen / were → Cấu trúc câu điều kiện loại 2: If + S + V(quá khứ), S + would/could/might + V(nguyên mẫu)
D. would happen / had been → Không dùng câu điều kiện hỗn hợp loại 3+2 trong tình huống trên.