Chuyên đề 5: Chủ đề

If there isn’t enough rain,the hydropower station can not operate. A. When there isn’t enough rain,the hydropower station can operate. B. Unless there is enough rain,the hydropower station ca

49/50

If there isn’t enough rain,the hydropower station can not operate.

When there isn’t enough rain,the hydropower station can operate.

Unless there is enough rain,the hydropower station can operate.

Unless there isn’t enough rain,the hydropower station can not operate.

Unless there is enough rain,the hydropower station can’t operate.

Giải thích

Chọn C