Directions: Each of the following items features one part of a sentence, followed by four alternatives. Complete the sentence by choosing the correct alternative. You must stay inside

Step-by-step solution

The sentence requires a time clause to indicate the condition under which the action should be performed. The conjunction 'when' correctly introduces the time clause 'it starts raining', making the complete sentence 'You must stay inside when it starts raining'. The other options do not form a logically or grammatically correct sentence in this context. Answer: when it starts raining