Explanation

• The correct structure is “have to + base verb” → have to collect.
• To is used before the base form of the verb collect.
• Correct sentence: “You have to collect the letter while coming back from work.”

Last verified on 25-08-2026

Explanation

• The correct phrasal verb is “cut off”, meaning to stop or disconnect communication.
• “Cut off” is commonly used when communication or contact is completely stopped.
• Therefore, the correct sentence is: “All communication with the outside world has been cut off.”

Last verified on 25-08-2026

Explanation

• Correct sentence: He is married to my sister.
• We use “married to” when describing a person's marital relationship.

Last verified on 09-08-2026

Explanation

• The correct sentence is: "We received them at the airport."
• At is used for a specific place or location, such as an airport, station, or bus stop.

Last verified on 04-08-2026

Explanation

• Sentence: The company is concerned about the well-being of its employees.
• We use "concerned about" when we mean worried, anxious, or caring about someone's welfare.
• We use "concerned with" when we mean involved in, dealing with, or busy with a specific topic or business.

Additional information:

• Concerned about means worried about something.

Last verified on 27-07-2026