Question

Difficulty: EasyConjunctions and Clause Structure

Fill in the blank with the most appropriate conjunction to complete the sentence below correctly.

Answer:Candidates will not be allowed to write the examination 【unless】 they present a valid registration slip.

Answer

The correct conjunction to complete the sentence is 'unless'.
The conjunction 'unless' functions as a subordinating conjunction of condition meaning 'except if'. It correctly connects the negative main clause with the prerequisite condition in the subordinate clause.

Step-by-Step Solution

1
Analyze the relationship between the main clause and the subordinate clause in the sentence.
The main clause states a negative outcome ('Candidates will not be allowed to write the examination'), which depends on a required prerequisite ('they present a valid registration slip').
Identifying the logical relationship helps determine whether the missing word expresses cause, contrast, time, or condition.
2
Select the subordinating conjunction of condition that means 'except if'.
The conjunction 'unless' means 'if... not' or 'except under the condition that', which fits the required meaning of the sentence.
Using 'unless' establishes that presenting the registration slip is the necessary condition to avoid being barred from the examination.

Key Concept

Subordinating Conjunctions of Condition
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