Fill in the blanks with the most appropriate word.
Please, start your meal. If you _____ your soup now, it _____ cold.
This sentence shows a fact and is making a statement about a real and possible situation. Hence, it is using first conditional that employs forms of verbs in present and future tenses. The structure of first conditional is: "If" Clause (If + present simple + comma) followed by Main Clause (Subject + will/other modal + base verb). So, Option D is the correct answer here as it has verbs of present and future tenses. Options A and B cannot be used as they contain verbs of past tense. Option C cannot be used as it would render the sentence grammatically incorrect.