If
When
No sooner did
Unless
Answer is Right!
Answer is Wrong!
The correct answer is: A. If
The word “if” is used to introduce a condition or possibility. In this case, the condition is that the man complains. The consequence of the condition is that the police will take action.
The other options are not correct because they do not introduce a condition.
- When is used to introduce a time when something happens. In this case, the time is when the man complains. However, the question is not asking about when the man will complain, but about what will happen if he does complain.
- No sooner did is used to introduce two events that happen very close together in time. In this case, the two events are the man complaining and the police taking action. However, the question is not asking about how quickly the police will take action, but about what will happen if the man complains.
- Unless is used to introduce a condition that must be met in order for something to happen. In this case, the condition is that the man does not complain. However, the question is not asking about what will happen if the man does not complain, but about what will happen if he does complain.