Polluted air causes a lot of health problems. => If the air is polluted, ______________.

Hướng dẫn giải:

Đáp án đúng: If the air is polluted, there will be a lot of health problems.

Cấu trúc: If + S + V (simple present), S + will/can/shall + V

Polluted air causes a lot of health problems.

=> If the air is polluted, there will be a lot of health problems.

(Nếu không khí bị ô nhiễm, sẽ có rất nhiều vấn đề về sức khỏe.