Correct Answer: 1

Solution : The correct improvement for the sentence is: have not seen

Explanation: This option is the correct improvement because it uses the present perfect tense, "have not seen," which is more suitable for expressing the idea that the speaker hasn't seen the person for a long time, and there is a connection between the past and the present. The original sentence, "I did not see you for a long time," is in the simple past tense, which doesn't convey the same sense of ongoing relevance and connection to the present.

saw

• It suggests replacing "did not see" with "saw." However, it is grammatically incorrect because "saw" is in the simple past tense, and it doesn't convey the intended meaning of not seeing someone for an extended period.

have not been seeing

• It introduces a continuous aspect with "have not been seeing." While it conveys the idea of an ongoing absence of seeing someone, it is more complex and may not accurately represent the intended meaning. It suggests a continuous action rather than the past action with a connection to the present, which is better expressed by the present perfect tense.