They ___ since 8 a.m. and now they are tired. MCQ with Answer and Explanation

They ___ since 8 a.m. and now they are tired.
A. work
B. are working
C. have been working
D. worked
Answer: Option C
Solution (By JKSSB Mock Tests)
Action started in past and has just stopped with present result → Present Perfect Continuous.

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Practice More Tenses Questions

Question #1
If she studies, she ___ the exam.
A. passed
B. passes
C. would pass
D. will pass

Correct Answer: Option D


Explanation:
First conditional.

This question belongs to: English Tenses
Question #2
If I ___ a bird, I would fly.
A. be
B. am
C. were
D. was

Correct Answer: Option C


Explanation:
Unreal condition → 'were'.

This question belongs to: English Tenses
Question #3
They ___ in the garden since morning.
A. were working
B. have been working
C. worked
D. are working

Correct Answer: Option B


Explanation:
Present Perfect Continuous with 'since morning'.

This question belongs to: English Tenses