Read the sentence and choose the correct option. If it _____, I _____ at home.

The correct option is "rain, will stay". The sentence is a first conditional sentence, which uses the present simple in the 'if' clause and 'will' + base form of the verb in the main clause. The correct way to use the first conditional is to form the first part with the Present Simple tense, and the second part with Will + the main verb. So, "If it rains, I will stay at home" is correct. Therefore, the correct answer is: "rain, will stay" Here's the breakdown: * **If it rains**: This is the 'if' clause, using the present simple tense. * **I will stay at home**: This is the main clause, using 'will' + base form of the verb.