Unless you ___ harder, you will fail the exam.
Answer and explanation
Correct answer: C. work
In a first conditional the condition clause uses the present simple.
Answer: work.
Why not the others: will work: 'unless' clauses use the present simple. worked: the condition is about the future. are working: 'unless' here needs the simple present for a general condition.
Answer: work.
Why not the others: will work: 'unless' clauses use the present simple. worked: the condition is about the future. are working: 'unless' here needs the simple present for a general condition.
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