If we called 911, they would send an ambulance., If I were you, I would double-check the gas tank., If there were a fire, we would evacuate the building., If he knew first aid, he would help the injured person., If they had a flashlight, they would see better in the dark., If the alarm worked, it would warn everyone., If she stayed calm, she would make better decisions., If we followed the instructions, we would avoid accidents.,

Unit 4_Lesson B_Second Conditional

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