I ___ here for five years, but I’m quitting now due to never receiving any reward for my efforts.a) have been workingb) workedc) was workingd) have worked

To determine the correct answer for the sentence, let's analyze the options given based on the context provided.

Context Analysis

The phrase "I ___ here for five years" points to an action that began in the past and has continued to the present time. Since the individual mentions the duration ("for five years"), we need a verb form that implies this ongoing nature.

Option Evaluation

1. a) have been working: This option is in the present perfect continuous tense, which is appropriate for actions that started in the past and are still relevant or ongoing. It fits well in the context as it highlights the duration of time.

2. b) worked: This is the simple past tense, indicating a completed action without emphasis on duration or relevance to the present. It does not convey the ongoing nature of the work.

3. c) was working: This option is in the past continuous tense, suggesting that the action was happening in the past but does not indicate its current relevance or continuation.

4. d) have worked: This is the present perfect tense, which indicates that an action happened at an unspecified time before now. While it shows completion, it doesn’t imply the same duration as the continuous form.

Final Answer

Based on this analysis, the correct choice is: a) have been working.

So, the complete sentence reads: "I have been working here for five years, but I’m quitting now due to never receiving any reward for my efforts."