The best way to complete the second sentence such that it resembles the one given is "You must have left your phone in the restaurant."
Reason for using "must have"
- Using the phrase, "almost certain" infers that a person has little doubt that something has happened.
- The phrase, "must have" also infers little doubt and high probability.
The best phrase to fit in the second sentence that would both be grammatically correct and convey the same meaning, is therefore "must have."
In conclusion, the answer is "must have."
Find out more examples on completing sentences at https://brainly.com/question/84020.
