Directions: In the given question below, four sentences are given that may or may not contain an error. Choose the one that is grammatically as well as contextually correct and meaningful. If all the sentences are correct, mark "All are correct" as your answer.
1
Yesterday, while rushing to catch the bus, I lost my umbrella. I must have left it at the bus stop.
2
When will they arrive at the airport?
3
If he were there, he must have heard the talk.
4
The old man could not remember where he had deposited his money.
5
All are correct