Question 27: Unless we __________ more snow, we can’t go skiing. will

Question 27: Unless we __________ more snow, we can’t go skiing.

• A. will have
• B. have
• C. have had
• D. had

Cấu trúc “unless” thay thế cho cấu trúc ” if  … not” (Trừ khi, nếu … không); Cấu trúc câu điều kiện loại 1: If + S + V(s/es), S + will/can/shall + V(nguyên mẫu).