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The phrase "By the time we arrived" indicates that one event (the train leaving) happened before another past event (our arrival).The past perfect tense ("had already left") is used to describe an action that was completed before another past event.Thus, the correct sentence is: "By the time we arrived at the station, the train had already left."
What does a proxy firewall do?
Which property is used to define the font of the element's text?
Which data analytics technique is suitable for handling missing data points in a dataset?
Which is false about layering in computer networks?
Which data structure stores elements in a sorted manner?
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What is the purpose of the "HAVING" clause in an SQL query?
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Which of the following table does not exists physically?
Which type of routing algorithm considers factors such as link cost and bandwidth to find the best path for data packets?