1 . The principal along with his students ----- planting tress for two hours.
- A. have been
- B. has been
- C. is
- D. are
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জাতীয় নিরাপত্তা গোয়েন্দা সংস্থা (NSI)।। ফিল্ড অফিসার (23-06-2023)
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