Question

a. _____ you ring the bell the servant won't come (if/unless).​

Answer 1

Answer:

unless you ring the bell servant won't come

Answer 2

Answer:

Unless you ring the bell the servant won't come.

Explanation:

The word unless means except if or if...not.

In the sentence,

Unless you ring the bell the servant would not come.

it means that, if the bell is not rung, the servant would not come.

For example-

1. Unless you do not submit the assignment, you shall not receive the report card.
2. Unless the pool is cleaned, no one is allowed to swim.

Conclusion:

Unless you ring the bell, the servant won't come.