If it _____ (rain), I _____ (stay) home. (zero)
If it rains, I stay home
If I _____ (win) the lottery, I _____ (travel) around the world. (first)
If I win the lottery, I will travel around the world.
If she _____ (study) hard, she _____ (pass) the exam. (first)
If she studies hard, she will pass the exam.